Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea196c0b22fd5f4…

MALICIOUS

PDF

34.9 KB Created: 2020-04-15 15:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fa6b52da7b82cb4c5f608186b0a4d30f SHA-1: 001315060bb1edd3434a810b92d1a3a3bd109d5e SHA-256: fea196c0b22fd5f4005b95ef0604238c7619169f8c6424a174d6ad1654e9a273
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on various domains. This is indicative of a link farm or SEO spam tactic, likely intended to drive traffic to malicious or compromised websites. The ML classifier strongly supports the malicious nature of this document.

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://thejohannreview.com/uploads/1/3/0/2/130289338/130289338.html#sql+database+tutorial+android
    • http://accuratethinker.com/uploads/1/3/1/4/131437357/4551744.pdf
    • http://urbanjoinerynw.com/uploads/1/3/1/4/131410009/9c95db.pdf
    • http://kerrycannon.com/uploads/1/3/1/6/131637169/febuwoludatage.pdf
    • http://vh-fit.com/uploads/1/3/0/5/130547373/3450630.pdf
    • http://novovivo.org/uploads/1/3/0/6/130620665/381318c6582c8e.pdf
    • http://boat-unlimited.com/uploads/1/3/0/9/130969686/04ad728e57.pdf
    • http://alexandershuttle.com/uploads/1/3/0/7/130739197/senamupazuwat.pdf
    • http://jessicaamerie.com/uploads/1/3/0/5/130551141/dofezud-temiz-baluto.pdf
    • http://woven4usolutions.com/uploads/1/3/0/6/130621868/7120359.pdf
    • http://pimetals.com/uploads/1/3/1/4/131408142/7375508.pdf
    • http://radiobethanie.net/uploads/1/3/0/6/130620982/6977dca46f730b.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_off00005e71.bin
17c1e67439774ebef6fcd0c86133ec37975589e87995c4b912a1b7126d2ccabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E71 8652 bytes

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