Malicious PDF — malware analysis report

Static analysis result for SHA-256 5212e6eaccb07f13…

MALICIOUS

PDF

73.9 KB Created: 2020-11-22 10:59:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ec240d76b7a8fbc903cb06aca2f41885 SHA-1: 0810bf909998e3e7c62ca45feefe659fb7b1b20c SHA-256: 5212e6eaccb07f131a46b426dd61838a441db6ab77bc398d107d29be596eb4c4
156 Risk Score

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-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://traffnew.ru/123?utm_term=barbie+cruise+ship+2002 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5fb2a742c093e.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/larubixepoleku.pdfIn PDF document text
    • https://kutowovazamil.weebly.com/uploads/1/3/4/3/134362820/996b5e2da1f096.pdfIn PDF document text
    • https://kabatinamipe.weebly.com/uploads/1/3/4/6/134636342/83004c50f4b0ba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421342/normal_5fb6f3355a2a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/994996ad-f461-43b1-a224-b2d5ef736355/gekafup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d3bd976-f657-4663-a11f-1e6b5a449c8f/sirona_connect_case_portal.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/solstices_and_equinoxes_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a2b442-3f9e-4c4a-8976-967933b40be7/58966895592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8381162-d24a-48a2-bfaa-ab2fec972164/27415516890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5539b9fa-ef2a-4874-a593-129923bc825a/best_two_handed_weapon_pathfinder.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_off0000e355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE355 5452 bytes
SHA-256: 8a9ac98bef94a3d968959930a977752f458e038a628dd0011d5449065652833a
font_01_sfnt_off0000f5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D4 10964 bytes
SHA-256: dc9ab5b52c682fd50692fb168913a08f1dd30e6c78017fc1cf121a94197d4a71