Malicious PDF — malware analysis report

Static analysis result for SHA-256 7489fd36bdf9971d…

MALICIOUS

PDF

39.0 KB Created: 2020-04-07 15:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0034c74694ae24cfbb9f5c8607213e62 SHA-1: 437772318e5a72d0e2cf2d25f47b0ad19523fb46 SHA-256: 7489fd36bdf9971d10ca2f552184903058b41b03c90d0f38add2df47eb29c0e0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, which is indicative of a link farm or redirection scheme. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages.

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://mcatransportsllc.org/uploads/1/3/0/5/130551143/130551143.html#example+of+a+marketing+plan+for+an+event
    • http://socialgracecreative.com/uploads/1/3/1/3/131379530/japujaxijorun_tobigusaxab_wiwovirosubabig.pdf
    • http://onlineadvice.com/uploads/1/3/0/4/130435598/kafute_kirupizaxotil_redexiwuw_ropijerigur.pdf
    • http://pardonruns.com/uploads/1/3/0/6/130604499/8586087.pdf
    • http://muskogeeanimal.com/uploads/1/3/0/3/130323818/628a83b31.pdf
    • http://oakeshottpropertysolutions.com/uploads/1/3/1/4/131453665/gazenegotido.pdf
    • http://thomasmayberry.com/uploads/1/3/1/4/131437755/bd2df86c2ef.pdf
    • http://savevietnamesc.com/uploads/1/3/0/6/130622007/wiwosexizexoluz_sujagigosoxi_sovulabuforezoj.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_off00006f57.bin
f61699f06a4785c620a99adfb4519e7d962a91c75b938e186e64e9be94106408		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F57 8324 bytes

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