Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8642103985c6d6…

MALICIOUS

PDF

29.4 KB Created: 2020-05-30 10:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: c0232931c291062c2861dace158b2ced SHA-1: 8a4dedfc47a5d3cc6ac11f25077e5f4ad1fd3282 SHA-256: 8e8642103985c6d67e56303ce70acef88a3cc670f7038d5544cf3e4bc1fdeb55
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous external links, a technique often used for SEO poisoning to drive traffic to malicious websites. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a likely attempt to lure users to compromised or malicious content. The embedded URLs point to domains that appear to be part of this link farm, suggesting a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9814

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://theyouthbox.com/uploads/1/3/0/3/130323415/130323415.html#2012+nissan+murano+repair+manual PDF link annotation
    • http://3hr.undesirable.us/uploads/1/3/0/5/130545485/7f958b0b49e.pdfIn PDF document text
    • http://ridetarga.com/uploads/1/3/0/2/130287839/gotokirawunozolep.pdfIn PDF document text
    • http://mail.ambitus.gr/uploads/1/3/0/5/130590661/9e81954d12a4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48B6 10100 bytes
SHA-256: 4d351c1286dc450114bbe9d37e63ae92b73be799fb2895985aac16f01683150c

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