Malicious PDF — malware analysis report

Static analysis result for SHA-256 5226ede9d1d3ab90…

MALICIOUS

PDF

66.6 KB Created: 2020-11-23 10:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c186fc32f20a96aa1287f36944d92f54 SHA-1: 1e442484f48af14d823a118e4c2398502c26cfad SHA-256: 5226ede9d1d3ab908d901c49500e248fb15eb9d8513c8969ad938be4d684e08a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=burn+notice+the+fall+of+sam+axe+full+movie+online+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f90b50deee0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417664/normal_5f9ac61290dd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385216/normal_5f8e8ca21e074.pdfIn PDF document text
    • https://jisuzinux.weebly.com/uploads/1/3/4/6/134671095/vekijore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446765/normal_5fb610f00a332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393181/normal_5f92029eb6ead.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458625/normal_5fad33f4bbe1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455174/normal_5fa84cffae0a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/jajibopozol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52711b1c-b865-4ee6-8776-8dcea9aa9973/13741141213.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_off0000c7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FD 5300 bytes
SHA-256: 949a9e91fd21f3e943a70a9786e24f05f104e7e00df5a07baa5342f1d76f7285
font_01_sfnt_off0000d9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E2 10284 bytes
SHA-256: 68be9b66abc8f8217f436c02ebae8d5cff91ba9d24f85ead5a6374a2d604e2da