Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dccb6267f7203ff…

MALICIOUS

PDF

32.5 KB Created: 2020-05-03 19:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 77bf0e79d3d77e3d9e0e9c563fc237f0 SHA-1: b373d02e5bf20347f4d799f1b72b5767a2f105d5 SHA-256: 0dccb6267f7203ffe89119b7211d743198aa233b70f3e13ea33ba1ac256e756a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains references to the URLs, reinforcing the link farm hypothesis.

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://houseforsalellc.com/uploads/1/3/0/5/130550833/130550833.html#demonstrative+adjectives+worksheets+for+grade+2
    • http://quadgear.org/uploads/1/3/1/3/131384663/3680d69101f.pdf
    • http://makamsindustries.com/uploads/1/3/0/2/130271103/208f6cdae77dc8.pdf
    • http://fhockeyskillz.com/uploads/1/3/1/1/131164168/8556e118617381d.pdf
    • http://mostdeliciouspoison.com/uploads/1/3/0/7/130776648/5788369.pdf
    • http://supertrampsale.com/uploads/1/3/0/5/130588497/8978431.pdf
    • http://islamicgardens.org/uploads/1/3/0/5/130588813/kawovasinirodigotaga.pdf
    • http://myleeinc.com/uploads/1/3/0/4/130476318/9501263.pdf
    • http://habitsforhealthcoaching.com/uploads/1/3/0/7/130739396/421903.pdf
    • http://raimelamb.com/uploads/1/3/0/6/130604687/ad57d13.pdf
    • http://pfdrdc.us/uploads/1/3/0/5/130545681/5645703.pdf
    • http://tessdevillier.com/uploads/1/3/1/4/131414134/vibixekidumekerij.pdf
    • http://mybeautytween.com/uploads/1/3/0/4/130435503/a30e3428125.pdf
    • http://comfortablechristianity.com/uploads/1/3/1/6/131607066/168557142.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off0000556e.bin
c4b5bc700f3c99f74ba68759e928319150c7b5b63900e1a10df297290065e17a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x556E 10096 bytes

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