Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3dcb1a57cebb8b6…

MALICIOUS

PDF

40.6 KB Created: 2020-06-15 15:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 165c78ff278f4698691a4cf4dd54fe6b SHA-1: b974e4e58f9bdaa4acc1e2589cc00914cd76a846 SHA-256: f3dcb1a57cebb8b6c9aa62689722c2fb0cfb80878f2a8d2b30ceb2c1a20d9cf9
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains numerous external links, a common tactic for SEO poisoning and driving traffic to malicious sites. The document body, though heavily obfuscated, contains references to 'BMW X3 user manual download' and embedded URLs pointing to domains like 'y1fkf.slpny.com' and 'agenziastop.com'. These elements suggest the PDF is part of a scheme to trick users into downloading further malicious content by impersonating legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://y1fkf.slpny.com/uploads/1/3/1/6/131637014/131637014.html#bmw+x3+user+manual+download
    • http://agenziastop.com/uploads/1/3/0/6/130621179/tavizep.pdf
    • http://kobucolorado.org/uploads/1/3/0/6/130603889/1538008.pdf
    • http://thinkducky.com/uploads/1/3/0/4/130483825/zumazobegetuviw.pdf
    • https://datefakifeba.files.wordpress.com/2020/06/paziputobirumeramesudif.pdf
    • https://panuvezipib.files.wordpress.com/2020/06/43678042283.pdf
    • https://bolivuxane.files.wordpress.com/2020/06/donesivoxegub.pdf
    • https://lifazafor.files.wordpress.com/2020/06/pumexegomogafefopuz.pdf
    • https://lavesuv.files.wordpress.com/2020/06/62030171027.pdf
    • https://julabifefo633366968.files.wordpress.com/2020/06/bonijetelavegifodivuzako.pdf
    • https://rejukuvis.files.wordpress.com/2020/06/26046314090.pdf
    • https://serumaputafe.files.wordpress.com/2020/06/sazadesurumivadeded.pdf
    • https://jumuxek227837891.files.wordpress.com/2020/06/ginaladidavapirofeke.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_off000070c2.bin
c3cdaa46b488565c442812c28b976973b2dd5e6d09bd370291bc7d6fab9d028b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C2 11256 bytes

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