Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4e8e94d514744c…

MALICIOUS

PDF

39.8 KB Created: 2020-03-29 15:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a2235e1f8a56e38eea2a3b53a2f7974d SHA-1: 5342a7c63d89d5257f0beff9131f2c35847baeaa SHA-256: de4e8e94d514744c533d83f328c2d1f752974d88a5bf46d2889263e974e81150
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 point to other PDF files on different domains. This pattern is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malware or engage in phishing. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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://miracleinabucket.com/uploads/1/3/1/3/131397996/131397996.html#rene+donde+lleva+acento
    • http://mindfulmoves.net/uploads/1/3/0/7/130739238/nikaxarimesex.pdf
    • http://sirneil.com/uploads/1/3/0/8/130813588/filaferadakirifuvo.pdf
    • http://elitassinari.net/uploads/1/3/0/4/130483923/7817695.pdf
    • http://gustavogonzalez.mx/uploads/1/3/1/3/131384293/7271736.pdf
    • http://morrisfood1beansflavor.com/uploads/1/3/0/9/130969639/295843.pdf
    • http://pawinhandtraining.com/uploads/1/3/0/2/130272353/2595f706.pdf
    • http://gayejee.com/uploads/1/3/1/4/131438234/jojigoruwin-puzamog-sudonirugike-jatuxoxebire.pdf
    • http://dccontractingllc.net/uploads/1/3/1/3/131384418/2d3c754b7fd35.pdf
    • http://cgdev.us/uploads/1/3/0/7/130739603/3b5ac31.pdf
    • http://youthening.org/uploads/1/3/1/1/131163634/nusodebofiz-bifim-babokavomanixen.pdf
    • http://dekeure.nl/uploads/1/3/0/5/130590594/gunema.pdf
    • http://hushmedia.me/uploads/1/3/0/6/130620616/luxelobezalamom_pivipunofuxokaz.pdf
    • http://mawilabs.com/uploads/1/3/0/4/130435722/faa16c.pdf
    • http://tysconcessions.com/uploads/1/3/0/5/130545485/begol_derezuvov.pdf
    • http://luctravers.com/uploads/1/3/0/7/130775968/8345856.pdf
    • http://handcraftedgifts.org/uploads/1/3/0/4/130477085/vebor_mewivarawaf_xeravevufedev.pdf
    • http://conflan.net/uploads/1/3/0/9/130969042/4602313.pdf
    • http://twentyonecapital.com/uploads/1/3/1/3/131398174/mekegomedi-vokafolunov-wonosetoke.pdf
    • http://doubledutycleaning.com/uploads/1/3/0/4/130490378/3760436.pdf
    • http://goldenspiraldesigns.com/uploads/1/3/0/5/130539202/saritekoregufujoru.pdf
    • http://heavenlyadventures.net/uploads/1/3/0/8/130874265/gifuwunobofo_xaberemuj.pdf
    • http://hallieemerson.com/uploads/1/3/0/4/130435726/kasazosunuz.pdf
    • http://joyallison.net/uploads/1/3/0/5/130543053/kexik.pdf
    • http://therusticbeeok.com/uploads/1/3/0/3/130379367/lasitowazorizubotu.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_off000071c8.bin
17b46deab8e0ee774b31d4e81daaa2a2cdbdcfc97d5bb47f5dc7771223b4c18d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C8 8156 bytes

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