Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f52bfa1a2b0a7d9…

MALICIOUS

PDF

30.2 KB Created: 2020-04-11 01:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ccd5313fe080de5607a471fa97485e27 SHA-1: 0eb56b390e38c6aeb2799eff8c51c0f0f6d069be SHA-256: 4f52bfa1a2b0a7d9159b5e2d2d0f9f56bf33b98f439d16962aadb2a868145766
94 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains. The document body, though partially corrupted, contains references to 'Pirates of the Caribbean 4 watch onl', suggesting a lure for pirated content. The PDF_SEO_LINK_FARM heuristic firing confirms the presence of a mass external PDF link farm, indicating a likely attempt to drive traffic to potentially malicious or ad-filled websites. No scripts were extracted from this sample.

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://greenwolfverticalfarm.com/uploads/1/3/0/3/130313368/130313368.html#pirates+of+the+caribbean+4+watch+onl
    • http://alloexo.studio/uploads/1/3/1/4/131438008/3127584.pdf
    • http://sarahhoist.com/uploads/1/3/1/4/131406361/supiviworexazin-muzeki-xobotuta-pefexizelida.pdf
    • http://tidywhitiesbookings.com/uploads/1/3/0/6/130620491/jonesolibukepez.pdf
    • http://proteus-mrighifu.net/uploads/1/3/1/4/131483006/zenuxojuxuxixur-vetiwewikeronol.pdf
    • http://dj-imba.com/uploads/1/3/1/1/131163666/23b679c.pdf
    • http://paullucaswriter.com/uploads/1/3/1/4/131406535/nefavado.pdf
    • http://strategiesforwriting.net/uploads/1/3/0/7/130739723/bavebinobon-kogimalixujiza.pdf
    • http://moonrift.com/uploads/1/3/0/4/130488396/4130716.pdf
    • http://countrysheakandboutique.com/uploads/1/3/0/5/130538862/d6442bea9d72b.pdf
    • http://graysonmichaelbeats.com/uploads/1/3/0/5/130590203/f0b07d88c94f.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_off00004f56.bin
b6c43119f9d0b3c21d3540598bc545e9eeded614e198f18d00f83a158a00d90d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F56 7868 bytes

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