Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64f0c892a3c7ffd…

MALICIOUS

PDF

74.7 KB Created: 2021-09-18 08:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc9ab4a738dbc69d024646273430de6c SHA-1: cd338250fe3b7f0c7ee55008e91b7ff2b08bacac SHA-256: d64f0c892a3c7ffd952fa68e3a50ac8ea6e5707f73ee13be814e28b3014c74ec
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm on disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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 https://mmoxx.mn/userfiles/files/mitajituvabepuzotojog.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132692452c10---67651318720.pdf
    • http://konberdbio.com/upload/files/rawigikupavakasugov.pdf
    • http://harrodsrentacar.com/public_html/userfiles/file/10642114791.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613c39a9121ee---36519741980.pdf
    • http://supermarketdv.ru/files/file/47107105831.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/euptdim94o4advvbl3ql022cc4/80830099271.pdf
    • http://www.mostenpo.jp/userfiles/files/kenasibinusotijidokek.pdf
    • http://rsti.biz/files/fck/file/papuburujok.pdf
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93061962467.pdf
    • http://gamecoast.by/uploads/files/81203613428.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/805cbb9431973b95e8d5283a6a75cc5f/xolagebukuwaxivujumolok.pdf
    • https://euinsuti.uniluxgym.ro/app/webroot/files/userfiles/files/kuwunawezutase.pdf
    • http://ilyxrace.com/userfiles/files/68091050729.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/7c029d45d332c693f4f970a143c5eea6/90734515390.pdf
    • http://timavoshipsupply.it/userfiles/file/netezawebitosepewixojip.pdf
    • http://signauction.net/userfiles/file/63470583420.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/c9abdf41d52ab79751fe23eadd60084d/98770015849.pdf
    • http://h-st.nl/bestanden/files/sosulubedobopixim.pdf
    • http://traiteur-ribot.fr/userfiles/file/vukotexuz.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bff8b8170d---zugulovozazikeku.pdf
    • https://privatecambodiatour.com/userfiles/file/60242070144.pdf
    • https://sibois.eu/userfiles/file/60475576032.pdf
    • http://abwrichmond.com/uploads/files/foruzekib.pdf
    • http://micronforgacsolo.hu/UserFiles/file/supunuvuwogevugaxasiwo.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/161418d21e1d82---9570546941.pdf
    • http://boki.hu/editor_up/85875750926.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=avengers+infinity+war+full+movie+download+filmyzilla
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bec2.bin
9aa2de6010bddcc4e9368f6f56882905503d0003ac742d6198cc205eba519bd1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC2 17024 bytes
font_01_sfnt_off0000ea76.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA76 16792 bytes
font_02_sfnt_off0001028d.bin
5544324890a055a864faf19aa16eaec539b7669c7dd82fb7fcc98d0991e2e565
pdf-font-stream PDF embedded font (sfnt) at offset 0x1028D 11104 bytes