Malicious PDF — malware analysis report

Static analysis result for SHA-256 80641e0719c918fd…

MALICIOUS

PDF

37.8 KB Created: 2020-04-05 04:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9ad41726ec43dd809dd4f8dd83ff26d6 SHA-1: 0c36594de70e04b469f61fd9062c2864cffddd9b SHA-256: 80641e0719c918fde744ace1a795e49fb4c078a694dfdacf844b8959f21aceaf
92 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 redirect users to malicious sites. The document body, though partially corrupted, includes a title related to LaTeX, which appears to be a lure. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates a malicious intent to generate traffic or distribute further payloads via these numerous links.

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://cubistengineering.net/uploads/1/3/0/2/130272994/130272994.html#como+subrayar+un+texto+en+latex
    • http://playpass.net/uploads/1/3/0/4/130476511/rigonixufidixinoxa.pdf
    • http://coreydriggs.com/uploads/1/3/0/6/130604044/9450689.pdf
    • http://sustainablecannabiscoalition.com/uploads/1/3/0/3/130379062/cbdb0d2.pdf
    • http://builder.anikosspa.net/uploads/1/3/1/0/131069750/giburofatiju-kugewi-tijoraj-noxupajana.pdf
    • http://greatcleaningcrew.com/uploads/1/3/0/7/130739802/bubobofivusofo-muwilovaxerotot-nelifunereno-mapelolinat.pdf
    • http://beautifulsound.space/uploads/1/3/0/5/130588461/xexexurerilegopofev.pdf
    • http://brainandb.one/uploads/1/3/1/4/131407395/tepefusegedim.pdf
    • http://mygalagiving.com/uploads/1/3/0/5/130551483/8232872.pdf
    • http://dealofthedaychevyz71.com/uploads/1/3/1/3/131380339/nowosasurotido.pdf
    • http://triathlonspecificyoga.com/uploads/1/3/0/2/130288502/2c9b21ab.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_off00006735.bin
d17e0d04371764b16f040886155826519ea74284804d800e5ec74492a75c497e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6735 9248 bytes

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