Malicious PDF — malware analysis report

Static analysis result for SHA-256 70dc2e2106d4318c…

MALICIOUS

PDF

88.9 KB Created: 2021-06-29 13:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f97c48ea29b609f1ed4046e2654ba01d SHA-1: 1a12e8a423f910d55436d78b747c7605bfd4d305 SHA-256: 70dc2e2106d4318c69bac64ce463e5b8965bc2d8ef52e6a2516964b355e28017
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. While no scripts were explicitly extracted, the nature of the links and the heuristics suggest the document's primary purpose is to lead users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pirkitpadangas.lt/ckfinder/userfiles/files/dikiwowireloputo.pdf
    • http://stylekd.ru/files/minaxirojelujavivep.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095720413847---fibejodufi.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/49870418028.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/82600954197.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/93e0d77c75b4c3adba7f7e48af681ce1/30501397482.pdf
    • https://namlongadc.vn/uploads/news/files/12594217346.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e52c4a307d---gadagevuburubipupov.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/vtjpprp5r7bvqtf91v0fjvreu0/nejalagovakabusofuxota.pdf
    • http://toyteepee.com/uploadfiles/file/210524015952351724yrmhom.pdf
    • http://katachizu.com/img/news/files/98030683675.pdf
    • http://gistys.com/userfiles/file/14908917013.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/4st72v53olqral891tqt79h44h/sinaxewojamumitajijumo.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4e3493fec---25412834788.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad09fd834a4---soboretolerowepugafulike.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/1d4244f9bceb49c16b675936aab29a66/19902830706.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/d7cvvcp41c93ak8ggtvg2u63t3/16633081448.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/5884020121.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/52adaaebf9dad3f79549d603edc55db1/gopagimugazudenowe.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/803448ce53975f4735886d024d22caa9/48490261937.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/d551b0447b2ec879a314b71b3c3ac5d7/gasewoxeg.pdf
    • https://aimhc.com/userfiles/file/tifurejujonamowem.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=mexican+grocery+store+near+me
    • 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_off0000fb0f.bin
9224188a757d5b45e9ce3406d9fdc311758d5b3c7c1caa1274b52b1b76a17c8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0F 16440 bytes
font_01_sfnt_off000125a8.bin
f11cab0bbc4562669358793eacab2c833cb84c0afdaba82f653f65a182dbebd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x125A8 10736 bytes
font_02_sfnt_off00013e6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6A 16792 bytes