Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b55442a597a8c7…

MALICIOUS

PDF

45.0 KB Created: 2020-03-08 02:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c9429a03ccfc44c028cf4a87f7c4eccd SHA-1: 0c6376e6456276ed4f471fed819746fed5ed6229 SHA-256: 03b55442a597a8c7c847b7e907ceae6a0c9211422307dd7d58d5506886e94855
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The primary embedded link, 'http://x0903667xstreamtravel.xsideas.com/uploads/1/3/0/2/130287943/130287943.html#catholic+credo+download', is presented as a download for 'Catholic credo download', likely a social engineering lure. The ML classifier strongly indicates maliciousness, and the PDF structure with mass external links further supports this assessment.

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://x0903667xstreamtravel.xsideas.com/uploads/1/3/0/2/130287943/130287943.html#catholic+credo+download
    • http://opendatafestival.net/uploads/1/3/0/5/130547340/wakaxabopum.pdf
    • http://dnsprotools.com/uploads/1/3/0/7/130775519/vofowazasepam.pdf
    • http://www.leadingyouhome.org/uploads/1/3/0/5/130590265/5646234.pdf
    • http://mybreathing.space/uploads/1/3/0/3/130313638/gipewoxixuvezagod.pdf
    • http://integratedproductengineering.com/uploads/1/3/0/8/130815303/zadoxuboxipemibu.pdf
    • http://mail.mikeuziel.com/uploads/1/3/0/4/130483614/lovaj_pimegek_tetuni.pdf
    • http://thecraft2draft.com/uploads/1/3/0/5/130590059/jitakukak.pdf
    • http://invoicee.com/uploads/1/3/0/8/130813957/109649.pdf
    • http://www.howlingmoonsshepherds.com/uploads/1/3/0/4/130435650/vuzizoxelem.pdf
    • http://trapstick.com/uploads/1/3/0/2/130271243/3926459.pdf
    • http://www.astrokin.com/uploads/1/3/0/6/130620956/8a2a62d12bb.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_off0000868a.bin
60038b50ba760d905141b97a26d96476d8d7332208068fb62a57a59d015323fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x868A 8584 bytes

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