Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cbb56ac0b20bd4…

MALICIOUS

PDF

65.2 KB Created: 2021-01-10 00:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 609b16594785c0101a0adcfbea2870e0 SHA-1: 75966b699867013fb8e876631196ecf35a2bef89 SHA-256: 64cbb56ac0b20bd4f3e0ad41df41fba782c57647ad818be1b3b9081b20a916dd
214 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the heuristic firing 'PDF_MALICIOUS_REDIRECTOR_LINK' point to an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=guide+du+routard+birmanie+d%2527+occasion In PDF document text
    • https://static.s123-cdn-static.com/uploads/4451021/normal_5fcf4b2cd5ff1.pdfIn PDF document text
    • https://kizujaxaluw.weebly.com/uploads/1/3/4/3/134393650/dadimevitopolexune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427501/normal_5fda8e9e63c91.pdfIn PDF document text
    • https://xagajopudulu.weebly.com/uploads/1/3/4/6/134697977/vopokuvorunajoz-sewerimopez-zemop-tujanavejururit.pdfIn PDF document text
    • https://wodanosivowifig.weebly.com/uploads/1/3/4/5/134593279/kotaxefuguxarusu.pdfIn PDF document text
    • https://site-1166739.mozfiles.com/files/1166739/sniper_ghost_warrior_4_contracts_review.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/vejosopamitido.pdfIn PDF document text
    • https://sobokiza.weebly.com/uploads/1/3/4/3/134363786/851c55a819e16.pdfIn PDF document text
    • https://site-1175584.mozfiles.com/files/1175584/58785926647.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kujapomib/tupukegamobigusibop.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/cimap_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/17327936168.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/lipikex.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC118 5260 bytes
SHA-256: a7a6970758c121e431a1c6f889ec9ef15752225fb168a3a7766f95be028be191
font_01_sfnt_off0000d2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 11000 bytes
SHA-256: e84e3e60e12930ea7642075f589a4a15e67be5ef2f2cf7715fc5c54dd83d4cf8

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