Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e6696d08d9c94c…

MALICIOUS

PDF

73.8 KB Created: 2020-12-18 00:07:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c4cfd5626aff04acdd980bd2adb26144 SHA-1: d95d4b314e47fe62005318bc2a72abc173633b04 SHA-256: 38e6696d08d9c94c77f0f513525921b7480566370286e2654f6c2ea58805a9e3
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 0.9998

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://trafficel.ru/123?utm_term=guess+that%2527s+why+they+call+it+the+blues+piano PDF link annotation
    • https://kutufexefe.weebly.com/uploads/1/3/4/6/134695169/3429956.pdfIn PDF document text
    • https://sinuxogutit.weebly.com/uploads/1/3/4/5/134505158/9614371.pdfIn PDF document text
    • https://padefogufagabak.weebly.com/uploads/1/3/4/7/134714354/4308283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5f9c63d479781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479474/normal_5fd7f0b995642.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/501417.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/vonuxagupeduze/61204749966.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/33033418762.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc726358651a0475196622d/t/5fcb026566ddd570b0edad14/1607139942897/xesizebevuvasubamiluxodu.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/gravity_falls_watch_season_2_online_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ffab8139af037645cac7/t/5fc192539d79364840c92201/1606521427874/national_electrical_code_2011.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/adobe_xd_for_windows_10_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/xasupoleri.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/greatest_common_factor_worksheet_4th_grade.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_off0000e05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05E 5324 bytes
SHA-256: 84dc0434b7483a2da47d1a675b52fbae2b83e4d37169aa5b3ce1bd0f3c175cc0
font_01_sfnt_off0000f29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29B 12032 bytes
SHA-256: 2a79d5df4e5ddd3331240899f18fdc758132300390e30ba9a14bd3d5ec272759

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