Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb085152e981448…

MALICIOUS

PDF

46.8 KB Created: 2020-04-06 03:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 995b2f36fa22a279c16b9bc16f45c10e SHA-1: def940573980145a9ee181d7200ed4e96c59b44a SHA-256: fdb085152e981448e0ea1bf8cc879fcfdfc7eba5eb6b994100cefc52362001d9
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files on different domains. This is indicative of a link farm or SEO spam tactic, potentially used to distribute malicious content or drive traffic to compromised sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body is largely unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://neokundalini.org/uploads/1/3/0/6/130620263/130620263.html#musculo+piramidal+de+la+nariz+inervacion
    • http://aalfilmfestival.com/uploads/1/3/0/8/130874146/vijuxaserupedas.pdf
    • http://polohouston.com/uploads/1/3/0/9/130968934/jebajemujulizuvu.pdf
    • http://delightfulbathandbody.net/uploads/1/3/0/5/130544413/migazexutudukozi.pdf
    • http://tasullivan.net/uploads/1/3/1/3/131379456/xepige.pdf
    • http://cloudyvisionsent.com/uploads/1/3/0/5/130588744/xobazeguwewisoderuj.pdf
    • http://belizegrowingpartners.com/uploads/1/3/0/6/130604086/be4c67281281b0.pdf
    • http://alexeliasof.com/uploads/1/3/0/2/130274169/sajidusu.pdf
    • http://chronicedibles.net/uploads/1/3/0/2/130287513/figuvabubopusevu.pdf
    • http://dbbcso.org/uploads/1/3/0/4/130483678/xomurofe_xuzofapesumiv_zinotizogi.pdf
    • http://lumenchase.com/uploads/1/3/0/6/130620150/mexasukak.pdf
    • http://superiorcartcompany.com/uploads/1/3/0/3/130379067/4458067.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ca5.bin
86977fa42cb2d5ce5385a6318fc6ea393862145cc5452b482f2f87057de920ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA5 8952 bytes
font_01_sfnt_off00008d2d.bin
e033d617ef68d3650e00c90640affd9051b1d73c4e49020d6404931b83873e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2D 2732 bytes
font_02_sfnt_off000096d9.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96D9 16036 bytes

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