Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e0cffaee9e6b72…

MALICIOUS

PDF

92.9 KB Created: 2021-07-03 23:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2d4f591eacd9e1a2144b06c12843f9d5 SHA-1: a2cf2a754f5fdf0b7bed6e1ea927a9f0f44d9240 SHA-256: c3e0cffaee9e6b727728c3e51a85eccd75abb69cb04092a438c813cee069eac1
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to compromised websites and disposable hosting, suggesting it is part of a phishing or malware distribution campaign. The presence of a 'password-protected archive handoff' heuristic indicates the document is designed to trick users into downloading a password-protected file, likely to bypass security scanning. The ML classifier and ClamAV detection strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://tunglamgarden.com/images/fck/file/19714901786.pdf In PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16089cd95ce6b3---38877723136.pdfIn PDF document text
    • https://luminex.pl/upload/file/37972630319.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/fivimukesokipiv.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/314e7c4fd12eb0a80617a0c22911b7a2/jufenaxinagesiwuzu.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/memibuvegupe.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/tolivanopigomepofina.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/jkjgfvffg382llusvcakbr3gp0/860405676.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b04da25b6d---lezanofisifo.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5039896456---74404831910.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b4bc5c30a---xitarixifujaxazaboxerojo.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/51064770164.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c3735dc97---setenisonomoz.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/8i8997ph9it6dft9cugi7dl976/dososok.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b9dd3d4c5---pasegadununixirudumezibim.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9afe0a05a4---tiliruxatogufinabod.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/lozokikimi.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df69d267a6f---14473208128.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/pejuzixeledalebutus.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/43041547869.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/pusuvajusaguvabes.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/tokaxizulofov.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/39d151c39ae91cab86079786aa15a94d/97617106867.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/nuboranedevelizowel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=appvalley+android+apkPDF 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_off00010725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10725 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F37 18616 bytes
SHA-256: d0e8d0aba5d29d38294dcfdb7d6e4564258ca737611fe7377baccd96b9c78fa4
font_02_sfnt_off00014ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC7 10372 bytes
SHA-256: f192fff74b93ad117137e5f00aac3e118b6701bb6ee2bb5834341867c1b1f0f1

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