Malicious PDF — malware analysis report

Static analysis result for SHA-256 1753c335343561b0…

MALICIOUS

PDF

75.8 KB Created: 2021-01-28 12:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ad838c1e9910735cef3173a729ad64d9 SHA-1: ef0ac5b3619923cc13fc2f7db2c57385e4cb7207 SHA-256: 1753c335343561b0b5779ce56726ac445c9767d4e2d7bdaa39e9ed5867a958b6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of generated links, suggesting an attempt to create a link farm for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://bologen.ru/aws?utm_term=incident+reporting+procedure+template PDF link annotation
    • https://bibokesoxi.weebly.com/uploads/1/3/4/8/134850131/984513c8ef05715.pdfIn PDF document text
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/2308260.pdfIn PDF document text
    • http://cashbackmoney.info/dodgers_rockies_score_last_nightqtcrd.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/5183940.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460709/normal_6001ea90a765c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428078/normal_600e8cfcafed0.pdfIn PDF document text
    • https://lemirupuzomive.weebly.com/uploads/1/3/2/8/132814022/18adff2f21.pdfIn PDF document text
    • https://suzuxagutif.weebly.com/uploads/1/3/4/3/134352905/bixatopadikuwo.pdfIn PDF document text
    • https://nenafefetu.weebly.com/uploads/1/3/1/4/131406263/db9e00f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420767/normal_5fde60a82d024.pdfIn PDF document text
    • http://kozlo.space/review_film_my_little_baby_jayan69ak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_60118a91d2cf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393883/normal_5fcb50ea8d47e.pdfIn PDF document text
    • https://cdn.sqhk.co/dufikibagi/dhbEih6/nukagopiwimidizexifalem.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/6rjgsji/nes_duck_hunt_gun_not_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375358/normal_600687162c178.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fc89d635c10c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446401/normal_5fd1d393b0238.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 5152 bytes
SHA-256: e201551627a0b393f754a848563a57dc6cb79edd67f68d7e2c021dbd3117e5a6
font_01_sfnt_off0000fdfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFE 10488 bytes
SHA-256: 31ffc11dd604eae837d21e6f0f4fd1b8d6f673575d53696dc9276fdf6b823f53

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