Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e23019cf13db2dd…

MALICIOUS

PDF

78.9 KB Created: 2020-11-17 20:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7dfbda9a4affa7a31068a0078b87296d SHA-1: dbfce2378f1d4e4d4978c41fd827adfc0118d5d8 SHA-256: 2e23019cf13db2dd81c9677aaf2c5eb256fefe92af361339fa752c23004a7a1c
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 0.9995

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://traffset.ru/123?utm_term=autocycle+helmet+laws+by+state PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427821/normal_5fa1c2458e644.pdfIn PDF document text
    • https://kuzasafeg.weebly.com/uploads/1/3/4/5/134586407/8bfeb436b51454c.pdfIn PDF document text
    • https://fiwisiroveton.weebly.com/uploads/1/3/4/3/134339953/pakoxo-vizojosutaviva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_5fa0562886713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379615/normal_5f96d26dcbe1c.pdfIn PDF document text
    • https://fisalusul.weebly.com/uploads/1/3/4/3/134341538/dorewiwoxinubofobo.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/vunizi/luwutimabenizuwibudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9d4a82-68b8-44ff-8800-52e07cb2b826/goodman_y_gilman_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/febakemirajozuxuz.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/mean_street_ministries_resource_guide_denver.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/physiology_of_microorganisms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ad0ff8-cbf2-4922-ab48-622444064411/college_physics_alan_giambattista.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2E 4996 bytes
SHA-256: ac3f2d71b4381792bf78d6decba007ea799609cdd743da7dd8c708199eb568bd
font_01_sfnt_off0000ef42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0000faa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 10940 bytes
SHA-256: c1e391d41d057c6b2173dffc5b82edd118bc8565786fdd088ccf4b5e53ec99d3
font_03_sfnt_off00012013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12013 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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