Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d661e0fae158442…

MALICIOUS

PDF

59.4 KB Created: 2020-12-04 02:20:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a2942da8da9da58930666f900fa16c7d SHA-1: 53e3e33c7ad252912243fb8ae2bd43a6d02bd303 SHA-256: 1d661e0fae15844274c10597b65dd674668454774bef809ad89ea0d88f82ff22
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://traffking.ru/strik?utm_term=the+odyssey+socratic+seminar+answers PDF link annotation
    • https://sekoxakukajafal.weebly.com/uploads/1/3/4/7/134705290/7246848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5fa9521b2ccb3.pdfIn PDF document text
    • https://basurujilitafap.weebly.com/uploads/1/3/4/5/134595952/fenenevaxas-pizukelibivu-dugunevaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_5fa9843603ae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481831/normal_5fafd723c696c.pdfIn PDF document text
    • https://pelixenebedevo.weebly.com/uploads/1/3/4/3/134338689/4007035.pdfIn PDF document text
    • https://girejegi.weebly.com/uploads/1/3/4/4/134490844/kudaxebiloteg-jajadip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5f8ec2a53a09f.pdfIn PDF document text
    • https://jupimoxojufe.weebly.com/uploads/1/3/4/8/134860775/4871469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450746/normal_5fb2ceb6d26dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5c6408845d092481e557/1606376548970/hobs_fall_cave_save_larina.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2fe06403f5353fda36cb8/t/5fc402824f983757205c3e34/1606681218874/sutabakugebonuzeze.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_off0000adac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADAC 5288 bytes
SHA-256: f1ba155c9d6ca62d92f3f53ec753d35db262c4fcf7e01dbb023a9acbe6674ceb
font_01_sfnt_off0000bf91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF91 9820 bytes
SHA-256: 65377cc15d67c30df1bd8e0247d1f489f08c094b4a4ff1a40c7ca0388f9de24b

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