Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d16d0e7ebca5858…

MALICIOUS

PDF

40.6 KB Created: 2020-04-06 06:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b4f19e05d6914ad9c53ae58cbf003db7 SHA-1: baa44348bc43b5953c3abc5045abc23eadc4a43b SHA-256: 4d16d0e7ebca5858b8775fd7763eba2231a733ebc67fce23e27490988eb003da
92 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection tactic. The document body, though partially corrupted, contains Spanish text related to creating an email account for Facebook, which serves as a lure. The ML classifier strongly indicated maliciousness, and the presence of numerous unknown URLs points towards a campaign distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://set4therapy.net/uploads/1/3/0/2/130291662/130291662.html#crear+cuenta+de+correo+electronico+hotmail+para+facebook
    • http://itsnothingood.com/uploads/1/3/0/6/130621413/2878104.pdf
    • http://thehowtogeeks.com/uploads/1/3/0/6/130604512/mopajogiwu.pdf
    • http://stonemoon.shop/uploads/1/3/1/4/131453602/kizos-zerudaxorogeg-toduke-keguwosigifa.pdf
    • http://eba-portfolio-jayla.com/uploads/1/3/0/8/130813100/3841363.pdf
    • http://huntressridingaparel.com/uploads/1/3/0/5/130544468/vojevupamonixidopa.pdf
    • http://claritysolutions.net/uploads/1/3/1/1/131163776/nefixawelewol_tugomuvetirose_tokegare.pdf
    • http://glasssplashbackstudio.com/uploads/1/3/0/7/130775889/madakutakexit.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_off0000731f.bin
2007e3bd0e775dc274f7d8506a7222834006fc446ecebbd095d57ebd8903e570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731F 8844 bytes

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