Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0d9283bbcd1548…

MALICIOUS

PDF

39.4 KB Created: 2020-05-20 00:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d43e48c7d7bde2322faa3efc65437ead SHA-1: d1538924f334ba5cf56f31b0be3234a00e046ba1 SHA-256: fc0d9283bbcd15480fc3641fb748d7a4d6ea075430fda51f16bf2caaa968aa25
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body text, though partially corrupted, includes a URL related to passing drug tests, which is a common lure for phishing or scam operations. The ML classifier strongly indicated maliciousness, supporting the interpretation of these links as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://unicoiwinetrail.com/uploads/1/3/1/4/131437623/131437623.html#can+azo+cranberry+pills+help+pass+a+drug+test
    • http://advokatbernander.com/uploads/1/3/1/4/131452825/6510850.pdf
    • http://templebethmoshe.org/uploads/1/3/1/3/131398498/finekitaxafob.pdf
    • http://brianchism.com/uploads/1/3/0/6/130620791/8373ba1.pdf
    • http://saporirumeni.com/uploads/1/3/0/5/130588710/viruroje_konusenowon.pdf
    • http://beauty-obsessed-and-blessed.com/uploads/1/3/0/7/130739053/9661115.pdf
    • http://blessedfamily.net/uploads/1/3/0/7/130775747/48cd6666bd.pdf
    • http://lafabriquededessins.com/uploads/1/3/1/6/131637365/7475039.pdf
    • http://takechargetotalwellness.com/uploads/1/3/1/4/131437671/c098ef6.pdf
    • http://3500industrialroad.com/uploads/1/3/0/6/130603946/mavedajunuvajas.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fab.bin
238ce4cae0a2136047ec5b79c3d7b0ab3bc989e86e8f8f304e97efbc1836ef24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAB 10100 bytes

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