Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12cc71242fc361c…

MALICIOUS

PDF

58.6 KB Created: 2021-02-04 08:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: eb7fc3aba9f87b0467f964213de1396d SHA-1: 62983007e4cbfb1e91e50b82323ee1f37d8f9222 SHA-256: c12cc71242fc361c000ddbc3568ee3623afe3b6e25914695723f07dac1e04ed2
124 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and Weebly-hosted content, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to potentially malicious or ad-filled websites, likely as part of a phishing or traffic generation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8253

Heuristics 4

  • 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
  • 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://jottigo.ru/aws?utm_term=financial+analysis+report+template+word+free PDF link annotation
    • https://cdn.sqhk.co/letinumi/b9Aheii/domain_checker_squarespace.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/domufow.pdfIn PDF document text
    • https://pugoxadegile.weebly.com/uploads/1/3/1/3/131379866/a5a05cb3.pdfIn PDF document text
    • https://zojovotonoturur.weebly.com/uploads/1/3/5/3/135348007/vuzovazanalexodabe.pdfIn PDF document text
    • https://sifapovidajep.weebly.com/uploads/1/3/0/7/130738911/4162894.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/iuhbugc/warfighting_functions_army_ppt.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/Giehhjh/vusakotu.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/nhfihjh/809146681.pdfIn PDF document text
    • https://xuvamedinomu.weebly.com/uploads/1/3/5/3/135392700/1383936.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/nugekuw.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/0TUjh54/85853614150.pdfIn PDF document text
    • https://jujuguzifise.weebly.com/uploads/1/3/5/2/135299578/4707694.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/tirimofufemukat/69443046562.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/dorekufefi.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/4422884969.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/9521672645.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2F 5448 bytes
SHA-256: 68a4b6b3a91a8f4fd1d6ad499493c2a5fd983760a2ac50849912602c4d93ec0c