Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b989229560a4db…

MALICIOUS

PDF

33.0 KB Created: 2020-06-04 14:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70508b7eb0bacea9ca0344921743d350 SHA-1: 88284998b73dda469feddfdfa5ed43e4725a1577 SHA-256: 64b989229560a4db87ca3b9ef711c2053f09211cf301b53b1b3d34f435883824
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, also contains URLs that appear to be part of this link farm. This suggests a tactic to drive traffic to potentially malicious or spam-related websites, possibly for phishing or SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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 http://scenarscot.com/uploads/1/3/0/4/130483632/130483632.html#respironics+bipap+pro+bi-+flex+user+manual
    • http://zoongla.com/uploads/1/3/1/4/131410812/4d9c3a.pdf
    • http://mail.officeplayground.com/uploads/1/3/1/3/131384250/7019190.pdf
    • http://74-123-75-189.mgwnet.com/uploads/1/3/1/4/131438418/9617498.pdf
    • http://scenarscot.com/uploads/1/3/0/4/130483632/terms.html
    • http://scenarscot.com/uploads/1/3/0/4/130483632/dmca.html
    • http://scenarscot.com/uploads/1/3/0/4/130483632/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://julabifefo633366968.files.wordpress.com/2020/06/rukureken.pdf
    • https://pugurikerode.files.wordpress.com/2020/06/fufuveja.pdf
    • https://xolupola.files.wordpress.com/2020/06/62186001015.pdf
    • https://wibakozom510253839.files.wordpress.com/2020/06/difuxo.pdf
    • https://sejidinaduk.files.wordpress.com/2020/06/91433875430.pdf
    • https://kilopixari.files.wordpress.com/2020/06/58831111924.pdf
    • https://pumopegebar.files.wordpress.com/2020/06/muteliwaveninaz.pdf
    • https://pamidabi.files.wordpress.com/2020/06/tarisidadezumiw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005661.bin
ec5a9e2ed15cb23f19ae2574aa85094d371e8f23bdfbfe6a5f23120df3437236		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5661 10016 bytes

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