Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdac9aecafc49df8…

MALICIOUS

PDF

70.6 KB Created: 2021-02-07 22:23:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 27c85fceaf3f9aa633550ad83ac8ec26 SHA-1: f0cad5f27eebf4ba6531981663c12850a9aa680a SHA-256: cdac9aecafc49df8444bda982b27d316e5cc4a516da53872ba76b6d9f1dab825
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 SEO spam. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

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://maypoin.ru/aws?utm_term=anti+human+trafficking+act+pdf PDF link annotation
    • https://mixusabap.weebly.com/uploads/1/3/4/0/134096097/lidozubewifa_fipiraxorav.pdfIn PDF document text
    • https://cdn.sqhk.co/woxekivepi/jiifzih/airtime_watch_together_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453907/normal_6018797a8b056.pdfIn PDF document text
    • http://mizusowe.66ghz.com/zelda_breath_of_the_wild_2d.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/ajcjfjd/archery_gameplay_overhaul_nemesis_patch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408996/normal_5fe1c4a51ac36.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/biwuwukesazef/wufutafowivo.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/wazew.pdfIn PDF document text
    • http://webexopate.rf.gd/buxesulufinepobasut.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/18360601406.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/89148755628.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/50813450706.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/depadazoju.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/42971892320.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_off0000d7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DD 5412 bytes
SHA-256: 970d35e5fdd7679dd207744deab502cc5824a59e25a6a92522e3078c1e4ed5d7
font_01_sfnt_off0000ea1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1F 10260 bytes
SHA-256: 02ea3772d6e6184d2051b2da1c67afd60c49ca861fd74a428f2f2b0b7118ac97

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