Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2dc3c4afd125dd…

MALICIOUS

PDF

29.3 KB Created: 2020-04-15 13:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cbfe701c097b248c6f91334068881cb7 SHA-1: 3284dc2d7fb94e3e2483b6d02c70e67d0866bcd8 SHA-256: 1a2dc3c4afd125dd01cd1ce0382f4f695d210f7310858379e1fdd4bdc2e22816
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links to various domains, a technique often used for SEO poisoning or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The embedded URLs suggest a link farm designed to distribute traffic across multiple domains, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://asraifae.com/uploads/1/3/1/3/131398509/131398509.html#weather+and+climate+powerpoint+templates
    • http://themopsworthcustardcompany.com/uploads/1/3/0/6/130621958/8f2d36f8f8fd.pdf
    • http://hzdirect.nl/uploads/1/3/0/7/130739887/fanedexedi.pdf
    • http://fifthseason.net/uploads/1/3/0/5/130588923/mofaj.pdf
    • http://glenstonevillage.com/uploads/1/3/0/4/130476581/bemebokoriluz.pdf
    • http://drjohnnickens.com/uploads/1/3/0/5/130551543/fanefusaje.pdf
    • http://www.appointments.macksoftware.com/uploads/1/3/1/0/131070381/lodokubuv.pdf
    • http://ispiked.us/uploads/1/3/0/4/130488539/nozakawe-resomako-puxajutoletix-zolesisej.pdf
    • http://platinumservicegroup.org/uploads/1/3/1/3/131379719/xuzizoratofe.pdf
    • http://vendeseempresas.com/uploads/1/3/0/6/130621460/degawafirunaxina.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_off00004e9f.bin
72bacbcf11d30fb957e225c2304c4f0c92a3f55e58a831dc04d1f1b70a9783a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9F 6668 bytes

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