Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29b2d596f3514bc…

MALICIOUS

PDF

141.9 KB Created: 2021-06-27 10:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8ef922b6180a14c72b5f059ee2a2ea25 SHA-1: add256d592d5c55aad0113349bd939519e4fc8c2 SHA-256: b29b2d596f3514bc05e5076d1faa0d962f59f79f96ee7c7ca8f3aaddf3099bad
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566 Phishing

This PDF file was detected as a phishing and malicious trojan by ClamAV. It contains numerous links, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' specifically indicates a lure impersonating Facebook, aiming to steal credentials via a link that does not match the impersonated brand. No scripts were extracted, but the presence of multiple external links and the phishing lure strongly indicate an attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=gmod+dead+space.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/tfjjfc5jbjf2jtkn0hpeui64c3/korimewemotumuwume.pdf In PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdf0011139---39880901251.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/72209087390.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/biwusepezumonag.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e457e542---63492408391.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/60u176amveb6kcvspchbkvingp/wupuwilinomezozewugakadew.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/jizuluwifa.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/aik9s58u29thjvnc84sd00670l/mavabesesulepewe.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091eeb750a9e---96029895865.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/rr5pq8kpml4femnnjvh9lc3v31/gorixopugugadefa.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210605_204409.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/gkk58v3q1jhpvom9qrsn9ok2k5/25620188946.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/13329183400.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/nekeliwutugegajozezorune.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cb37c3c905699d56cc8801faf350f22b/37431751766.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/59358916840.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/sedijivexixuxobosax.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/8d8343cedb87819c04d2fa14fcb89a93/masojakujepame.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/pudaxejiwisefotajojotagul.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eae3d8109---nonijikeremaz.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/f69eb6rv22t8oreriljebek950/jimeximosu.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/56080c5d0a76bede696e0b621709ca20/18454192092.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/panosi.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/dukerewavopakovuz.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1af6b15e2d---89750486933.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/jodig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=gmod+dead+spacePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001e0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0FA 19156 bytes
SHA-256: f516e3764beb2d83a7a668e2c95012f89066f9834489e08236c7ef170b0168fd
font_02_sfnt_off00021193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21193 10272 bytes
SHA-256: 35938546346c000a61fbaab272ec976c1cb3dd05248e5ed3341afd71ba801d91

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