Malicious PDF — malware analysis report

Static analysis result for SHA-256 f296e611a68f9587…

MALICIOUS

PDF

71.2 KB Created: 2020-11-25 07:11:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1ac4eadc6032e71c21b2601a65e00b51 SHA-1: 1b97e95016c7853416c1378cb94dbe5a5b3f5c59 SHA-256: f296e611a68f9587c9efef8122748856d48cd911d065f7444010972130744755
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards malicious intent, likely to redirect users to potentially harmful websites.

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://trafffe.ru/aws?utm_term=phpspreadsheet+load+xls PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5f91b2cdee2ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417662/normal_5fb4194803056.pdfIn PDF document text
    • https://tugoxalimirufa.weebly.com/uploads/1/3/4/3/134310877/6374327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422622/normal_5fa2d862e55ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_5fb81e4fb11ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421036/normal_5fa34e1c71e33.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/sexate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_5f90f236bf19e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454419/normal_5fabe996d079d.pdfIn PDF document text
    • https://nebemono.weebly.com/uploads/1/3/4/3/134331812/1e299d2b2b2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5f935a254d0f4.pdfIn PDF document text
    • https://gesovomovo.weebly.com/uploads/1/3/4/7/134716395/vuxoxepodenupakam.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/sigobija/gamers_rise_up_shirt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48052c3d-4929-472d-a3ae-c0bb74633ed6/18599307853.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/mangold_property_mgmt.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_off0000cf6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6E 4752 bytes
SHA-256: 56effd4e3e9e5e357cf9d6d8ff88a035ef4aeed706a1d60b983b9686a158d223
font_01_sfnt_off0000dfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA0 10072 bytes
SHA-256: 950f5b34a8e9a6eb1b7fc9023efdf40251c1351f217843cb9dda5623e946f24c
font_02_sfnt_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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