Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b25d9e4edf2684…

MALICIOUS

PDF

74.9 KB Created: 2021-09-04 20:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1100c0f5c5e5b8f04c4f3cfe13e0f6cd SHA-1: 06195592ed20ca480ba6028077a37e205a14166e SHA-256: 35b25d9e4edf26845053e1ee1fb77ae5ab4c0c4658dc69dacae63dbe06926acf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers confirm its malicious nature, specifically flagging it as phishing or a trojan. While no scripts were directly extracted, the PDF structure and link farm heuristic suggest it's intended to lure users to external malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/9204155b1a997317fde091abfcfe64ee/mewotegakevajuwif.pdf In PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/dnpa7dlt6g0kkhnan2thia190v/waberaga.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/jejatolebunisotenawusux.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/tixufewukafinapuvu.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/ac77f2d77ae80cf0e9538c53b984ac0c/27775889504.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/59065303773.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/1276bb8113c7e9a7b3b95cd865c4a43b/39145034305.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/volinuvujegaxelamejum.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/a3538897303322a77c5ef60561d16c18/37610565309.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/14789357501.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/3ab1cf701a29374dd84dacc33f1921d2/4515168254.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/75816185707.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3334b3e3c6---26738357076.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/lokakir.pdfIn PDF document text
    • http://www.siposferenc.hu/html/25873017889.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/fufabafofugulerugaze.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e5d27989f---mesomifuvakajatogokodadud.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/55768491175.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/xubumawab.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/99b01ce9154eca382ae160a8be619b9c/91981552417.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/fbl20hktb0qumi70038nlqf8to/34698142218.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/pixotasojobepolete.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/kafexopu.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/49664922951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=antroposentrisme+biosentrisme+dan+ekosentrisme+pdfPDF 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_off0000c332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC332 16332 bytes
SHA-256: 79a20d2ddfbe7acb8dc9aafa2fddd970bf7af35e4f384b546a1addf292ef7937
font_01_sfnt_off0000ec98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 10824 bytes
SHA-256: ba8c287350457ca5d1f51903a8b4d7b70b43da2a9e2df0b75ed4fca1e6522028
font_02_sfnt_off00010565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10565 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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