Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da3ec499344087a…

MALICIOUS

PDF

76.5 KB Created: 2021-03-19 03:37:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c9a62a65b5d1ad71b5fe322a28f50fbc SHA-1: cfe049c8b31cc6eb889c9384acdf42ae096cabca SHA-256: 6da3ec499344087a2168ac0b60bdd6b6bc63b51abb3b658981939a0a52f47662
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, appears to reference a 'Frigidaire freezer repair manual', likely a lure to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/wix?keyword=frigidaire+freezer+repair+manual PDF link annotation
    • https://sozejaras.weebly.com/uploads/1/3/2/6/132695734/zakurulofolawigu.pdfIn PDF document text
    • http://winfreeiphone.xyz/forizururovosibalasop1543.pdfIn PDF document text
    • https://saduzoxizujakef.weebly.com/uploads/1/3/1/0/131071125/sukuzoge.pdfIn PDF document text
    • http://itfamily.pro/40651825458f1nvm.pdfIn PDF document text
    • https://tewoxole.weebly.com/uploads/1/3/2/6/132695213/tekotawivo.pdfIn PDF document text
    • http://notdull-eng.online/27134285495lwcia.pdfIn PDF document text
    • http://jopkapopka.online/dua_when_entering_toilet9rzht.pdfIn PDF document text
    • http://hihikane.space/zujadorixowefasfgxt3.pdfIn PDF document text
    • http://1xbets-regs.site/40358421689he5wr.pdfIn PDF document text
    • http://sosogemizibu.mypressonline.com/nexatarota.pdfIn PDF document text
    • https://gumewutudeg.weebly.com/uploads/1/3/0/8/130813982/denupuw.pdfIn PDF document text
    • https://wuzivizafexun.weebly.com/uploads/1/3/1/4/131453021/sowabutepawavedoxero.pdfIn PDF document text
    • https://terenedadobi.weebly.com/uploads/1/3/5/9/135961601/2799591.pdfIn PDF document text
    • http://cashfree.store/gokikifuxnqsm.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/jagibe.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/40918642655.pdfIn PDF document text
    • https://raragunaxunu.weebly.com/uploads/1/3/4/8/134886293/af322c8.pdfIn PDF document text
    • http://mixit.info/nurijifamu9m0bi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://redebalumu.rf.gd/nijefe.pdfIn PDF document text
    • http://ruxofepugoloma.rf.gd/vimazofadurepomom.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 5188 bytes
SHA-256: b17e072ed979b10a3ad94fc0fe6ff866d5a62344f88fd52dccf2cc6641ddafd7
font_01_sfnt_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 10608 bytes
SHA-256: 5f65d92ec8d1cd43aba8ff38cda7c0db59db27482bdecbb1b0accdce43241b26

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