Malicious PDF — malware analysis report

Static analysis result for SHA-256 5543c58829daeace…

MALICIOUS

PDF

74.5 KB Created: 2020-11-18 12:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d8c5c726fb0515be04c132affac59462 SHA-1: a391178c3ecdcff2754209bd5088239ca9a02562 SHA-256: 5543c58829daeace674cef0af8f02dae83bcf6c462a3dcc4073cdf5894e47db8
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 it is likely a phishing or malware distribution attempt. The document contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or SEO spam tactic. One of the primary external links, https://traffset.ru/123?utm_term=are+there+branches+of+hinduism, is likely the intended destination for users seeking information, leading them to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://traffset.ru/123?utm_term=are+there+branches+of+hinduism PDF link annotation
    • https://pidivupam.weebly.com/uploads/1/3/4/3/134327465/ae8f493bfa04c5.pdfIn PDF document text
    • https://jamolirotiwe.weebly.com/uploads/1/3/4/6/134693152/wizududimuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5fae8d1e3d7ef.pdfIn PDF document text
    • https://siwuretigi.weebly.com/uploads/1/3/4/3/134319511/8313043.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/98665.pdfIn PDF document text
    • https://totapige.weebly.com/uploads/1/3/1/4/131483287/pomepevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f870ab86507c.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/ec3c2db6-42de-48a9-83f8-804029b4f8ae/belutufotarapusudara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/999ddef8-23ea-4ee6-be10-5539e41d4c86/70552912282.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_off0000e782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 5356 bytes
SHA-256: 9c87bea587ce21c2233308516ee00b49af1fb313af9857ffbd3cd7afd968e4eb
font_01_sfnt_off0000f98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98C 10892 bytes
SHA-256: 5b2bc6f9e986065d344e9d426c5f0bd26db48e6bc14fcb090856445226bf5185