Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c0def71346428c…

MALICIOUS

PDF

27.7 KB Created: 2020-04-28 20:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: afba54f5cb0ea5d8b0e29a860c133132 SHA-1: fa04b224a35211d0be2d196703802e2678542ce6 SHA-256: 58c0def71346428c77da61365fabfca1bd4d6b5761509b3347e1f4232b42389c
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to redirect users to malicious sites or to distribute further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • ClamAV: Pdf.Dropper.Agent-9228021-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9228021-0
  • 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://shiatsuthaiyogamassage.com/uploads/1/3/0/5/130550836/130550836.html#myers-+briggs+personality+type+indicator+pdf
    • http://dennistheflash.com/uploads/1/3/0/5/130588240/xisimolikanexaporino.pdf
    • http://rachellberlinartdesign.com/uploads/1/3/1/4/131438461/9281024d9c017.pdf
    • http://work-at-night.com/uploads/1/3/0/4/130476248/vevuwuremifutud.pdf
    • http://doughballexpress.com/uploads/1/3/1/4/131437210/sekibipivigopedor.pdf
    • http://maiwhy.org/uploads/1/3/0/8/130813325/vobazisotujul.pdf
    • http://streetsarerunways.com/uploads/1/3/0/6/130621076/neruzaneniwazixe.pdf
    • http://franckinvest.com/uploads/1/3/0/8/130814601/7105523.pdf
    • http://holychildcarehome.com/uploads/1/3/0/9/130969116/9899837.pdf
    • http://activefixtureinstallations.com/uploads/1/3/0/5/130551363/721947.pdf
    • http://debiarone.com/uploads/1/3/1/4/131407567/84b228bd.pdf
    • http://curvaceouscoutureweddingdressnh.com/uploads/1/3/1/1/131164308/nidejijewonopek.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_off00004a41.bin
9a2d56a1e07c1ccf68b70164817c8430aeb314dfb92dffb8ba9665691c4f4793		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A41 5888 bytes

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