Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb0c9872deec9b8…

MALICIOUS

PDF

34.1 KB Created: 2020-03-26 09:33:40 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a2229762c0fd238cf5ecba3ca2723b84 SHA-1: bbf665a47c55d69898ecd5a6ac4fd245a02008df SHA-256: 1cb0c9872deec9b8aba044f46532f62c54289ed980ebeef782bc948c7619f920
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO spam tactic. The document body, though partially corrupted, contains keywords related to manuals, further supporting the lure. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://juicyscoopobsessed.com/uploads/1/3/0/3/130323454/130323454.html#whirlpool+cabrio+dryer+manual+repair+manual
    • http://copperfield-creative.com/uploads/1/3/1/0/131070192/fitugoled.pdf
    • http://toursofcalifornia.com/uploads/1/3/0/4/130483204/2189450.pdf
    • http://thomasfam.ca/uploads/1/3/0/2/130272862/4b3a5.pdf
    • http://merrick-global.com/uploads/1/3/0/6/130639291/26eb0.pdf
    • http://myboathaus.com/uploads/1/3/1/0/131070491/solinarawer-gijasadi-fubulosuli.pdf
    • http://www.richardmedina.net/uploads/1/3/0/4/130476339/pujamumoj-vatavati-topaxobadegujif.pdf
    • http://storypalette.com/uploads/1/3/0/4/130436020/8668353.pdf
    • http://montanabridalshows.com/uploads/1/3/0/5/130588165/nevarowalukoxami.pdf
    • http://visualsport.org/uploads/1/3/0/5/130590567/newofokivabepifaxume.pdf
    • http://jackwindstudio.com/uploads/1/3/0/7/130775033/bozuzij.pdf
    • http://sequra.dk/uploads/1/3/0/5/130588613/napezazijubakut.pdf
    • http://www.999esports.org/uploads/1/3/0/6/130603822/0083b1.pdf
    • http://www.urbanraj.com/uploads/1/3/0/6/130604791/2505ee0b.pdf
    • http://www.lowcountryfishhouse.com/uploads/1/3/0/2/130291662/fazem.pdf
    • http://allentown-pa-workers-compensation-lawyers.com/uploads/1/3/0/6/130621033/8850253.pdf
    • http://newlifesdaoh.org/uploads/1/3/0/4/130436165/puzesogow-fibis-loburam.pdf
    • http://urbanvillagefitness.com/uploads/1/3/0/5/130540609/nuzunutorasudeb_lafufoge_koxifamivut.pdf
    • http://www.vfcsa.org/uploads/1/3/0/5/130543262/4630628.pdf
    • http://socalsupervision.org/uploads/1/3/0/6/130639491/sajeroponerevut.pdf
    • http://paymaat.com/uploads/1/3/0/6/130604582/kotowasob.pdf
    • http://hand-i-maids.com/uploads/1/3/0/3/130323908/xevomidupunibok_rilapupore_kugime.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_off00005e0e.bin
5f2a05e5384249cf409d2d23ca2282a24d7eabd6271e1abc9e50cbc6d725e482		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0E 7168 bytes

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