Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62842415857ed19…

MALICIOUS

PDF

83.0 KB Created: 2021-03-04 21:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2a32131476d80235a4b7102d347608a2 SHA-1: 33207560be41ff6d71cfc86acc892d0054c01ecf SHA-256: e62842415857ed1999dad79c6f2fe0174a64fff18f2903fd8964b75b9c47dca6
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. One of the embedded URLs, 'https://soxebez.ru/award?keyword=three+billy+goats+gruff+pdf', indicates a lure related to a children's story, likely to attract unsuspecting users. No scripts were extracted, but the PDF structure itself is used to host numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=three+billy+goats+gruff+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454966/normal_6020d3a6ae9c0.pdfIn PDF document text
    • https://bekitatabegoze.weebly.com/uploads/1/3/0/7/130775701/6596553.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/xapopewuwamomu.pdfIn PDF document text
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/zezizenonigunif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_602ef3445f4a7.pdfIn PDF document text
    • https://romigugegis.weebly.com/uploads/1/3/1/3/131384185/xolenojelezaz_xogajolal_gimofozage.pdfIn PDF document text
    • https://rarozevalir.weebly.com/uploads/1/3/1/4/131437937/2807deb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_6011714b0f81e.pdfIn PDF document text
    • https://xadonuxezi.weebly.com/uploads/1/3/4/1/134131919/binezizejovef.pdfIn PDF document text
    • https://limikasideg.weebly.com/uploads/1/3/4/4/134446439/7265081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5fd78c575d03d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_602d65c3640d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gupojakami/17887720177.pdfIn PDF document text
    • http://ridupokibi.epizy.com/kadeterakuzuwikuvuza.pdfIn PDF document text
    • http://linakagiwabofa.epizy.com/xulolamum.pdfIn PDF document text
    • http://tufukupetateto.epizy.com/basic_hydrology_experiment_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/watercolor_artist_magazine.pdfIn PDF document text
    • http://memegimowa.epizy.com/beledijiwamawutu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB67 5268 bytes
SHA-256: 0d257917ab2c79aa1e6db94fa2df491ef02e287a4f8521cbfdcca8b2366660cf
font_01_sfnt_off00010d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D66 10408 bytes
SHA-256: 4bab6ed3f5d5f17cbb826902600125ed2a501ba075268476880e7a8c4a37424f
font_02_sfnt_off000130d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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