Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe540f1ad6f08f82…

MALICIOUS

PDF

66.1 KB Created: 2020-12-17 03:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d80a7de64c1d258e06c63bab925bb1d9 SHA-1: 1bb2b0cb3b803d91ef29b958cbe8b8f4e4b99058 SHA-256: fe540f1ad6f08f829a2d34d7aa6967f05bf1bc7c43e489eb2058b702fd06dbaa
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a phishing or ad-fraud scheme, likely leveraging embedded JavaScript to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=maytag+range+manual+troubleshooting PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456387/normal_5fa5681d953e9.pdfIn PDF document text
    • https://kibanelamuvudu.weebly.com/uploads/1/3/0/9/130969844/vupetazipaviru.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/0c906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_5f90f47374e79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417309/normal_5fa81a93c07fa.pdfIn PDF document text
    • https://gejipowuxenufo.weebly.com/uploads/1/3/4/6/134681439/711682.pdfIn PDF document text
    • https://naxufubiromu.weebly.com/uploads/1/3/0/7/130738890/xafupuzep-webamitiw-varapipubiw-govijuvexafod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447447/normal_5fa7f439457d5.pdfIn PDF document text
    • https://rewudorabemomaf.weebly.com/uploads/1/3/4/2/134234845/nusasulado.pdfIn PDF document text
    • https://punebadajunejed.weebly.com/uploads/1/3/4/5/134597598/37b6063201f724.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427821/normal_5fcb98b56e0ee.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/ropuba/fraser_centrepoint_trust_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/bet_angel_user_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c9b5085bf90c0efc7ce4/t/5fc0f6381972c46e3cc10f30/1606481464367/ub40_labour_of_love_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57b87be9b69395129d29e/t/5fcd437f24c49707d32cd640/1607287681042/dogititudasevotufobu.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_off0000c7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E8 5344 bytes
SHA-256: 5e15b492cfaf408a21ea13da1c0561d06d2ffdec7dbde809f555d61c56cbda02
font_01_sfnt_off0000d9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FB 9880 bytes
SHA-256: 58b8725b4fcc5c73e681580f0054c0f544f3dbbd7634c9edc074cc320d89aa0b

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