Malicious PDF — malware analysis report

Static analysis result for SHA-256 f129928d8d907f27…

MALICIOUS

PDF

35.5 KB Created: 2020-06-01 06:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9126d506a549becc6c15073213707584 SHA-1: 0c7984cee96ef138f32f46e4665e11ab827b3189 SHA-256: f129928d8d907f27e02bcc2e20e77d799cebde0dcee6abcfec42bb84d1f3cfa7
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO poisoning or to direct users to malicious sites. The document body, though partially corrupted, contains a title in Danish ('How to remove nail polish from tile floors') which is likely a lure. The heuristic PDF_SEO_LINK_FARM firing indicates a deliberate attempt to create a link farm, suggesting a phishing or malware distribution campaign.

Heuristics 3

  • 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
  • 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://nutmeg-labradoodles.com/uploads/1/3/0/6/130620430/130620430.html#S%25C3%25A5dan+fjernes+neglelak+fra+flisegulv
    • http://barriersafeinspections.com/uploads/1/3/0/5/130590059/gixinitekap.pdf
    • http://fastlanetowing.org/uploads/1/3/0/2/130272426/keratepifit.pdf
    • http://teachingparents2teach.com/uploads/1/3/1/4/131483344/2ec463391629b.pdf
    • http://agnarfoodrun.com/uploads/1/3/0/5/130590521/6454741.pdf
    • http://mail.corvetteslimited.org/uploads/1/3/0/6/130603824/8459668.pdf
    • http://500ncondos.com/uploads/1/3/1/6/131637247/16125d99a36315.pdf
    • http://ucpgreatchefs.com/uploads/1/3/0/4/130478935/7d2353e1694103.pdf
    • https://vafurogi.files.wordpress.com/2020/05/48373508905.pdf
    • https://bomukibi.files.wordpress.com/2020/05/9126392651.pdf
    • https://buwivimew.files.wordpress.com/2020/05/fokorukeviwulerogarugurut.pdf
    • https://xinirex.files.wordpress.com/2020/06/55528825268.pdf
    • https://vemupuki.files.wordpress.com/2020/05/44789189415.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_off00005d5d.bin
8f5319561a71e7ba547bb5bf9ece6e7ab54ecbd9860694d27297c8c97afae0ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5D 10904 bytes

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