Malicious PDF — malware analysis report

Static analysis result for SHA-256 726c460a3bab19bb…

MALICIOUS

PDF

68.7 KB Created: 2020-12-15 10:01:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c9977086fb57eb5ccbb10de205c57ac3 SHA-1: 966a28a0b4c21f5f116f22bb4eb34b22faa2bb36 SHA-256: 726c460a3bab19bb07522551861dd97a9f73fea037ebaf68fefae83ff0ec4351
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to PDF files with numeric slugs, suggesting a link farm or SEO manipulation tactic. The primary external URL observed is https://trafficel.ru/123?utm_term=what+is+the+relationship+between+chromosomes+genes+and+alleles, which is likely part of the malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=what+is+the+relationship+between+chromosomes+genes+and+alleles PDF link annotation
    • https://roxunasof.weebly.com/uploads/1/3/4/3/134312726/deduzifunujukijaruli.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/385937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f9a69fa488b8.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/43a349bf4de6ea5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_5f9e56e8201b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8faecb35230.pdfIn PDF document text
    • https://fazofiketir.weebly.com/uploads/1/3/4/5/134507238/lutunexesupebaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f87f1a6f17cb.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/25b9d695-a12f-4544-9080-ae4927c8057b/tuketosaluxiguvumunasuw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceb9df703c0221cac6c897/t/5fd228a0ad61ab583193f0ca/1607608481921/taguvojimuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4156a0d1-3bcf-4642-8411-8ec602416df7/88461325886.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64bc08ef7301f8b35bd0e/t/5fd68c13164d0f203c823211/1607896086490/google_drive_file_stream_msi.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_off0000d00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00A 5732 bytes
SHA-256: e769fad818ecdaf183f4196439bd0af23c0c12eda13df8ffbe5aba90da645fc8
font_01_sfnt_off0000e374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE374 10040 bytes
SHA-256: 5f0837bbd5ecebc9502c13c5019222b6cdd4f575864ce0d1c493fc5dce416a58

Open this report in the interactive analyzer, or submit your own file for analysis.