Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dfe86712d471f58…

MALICIOUS

PDF

41.0 KB Created: 2020-04-21 22:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: beaf7f756f55df39f23ebb4868027a98 SHA-1: 6aabe536820bb5a2608e8070e390c8e9ed69fa89 SHA-256: 4dfe86712d471f5815a42d6f8e6b7b75051f94d4283b81a4233c163d9c59590b
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous external links, many of which point to domains that appear to be part of a link farm designed for SEO manipulation. One prominent link, http://setantaceol.com/uploads/1/3/0/7/130740069/130740069.html#marvel+heroes+mobile+game, suggests a lure related to mobile games. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm and the ML score indicate a high likelihood of malicious intent, likely to redirect users to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://setantaceol.com/uploads/1/3/0/7/130740069/130740069.html#marvel+heroes+mobile+game
    • http://cut50summit.org/uploads/1/3/0/7/130739393/galitabe-luxinike-lesir-javoketale.pdf
    • http://predictivestudies.org/uploads/1/3/1/3/131381679/6762375.pdf
    • http://gritnglitter.shop/uploads/1/3/1/3/131380930/afd0b45e0e.pdf
    • http://adronmentroom.com/uploads/1/3/0/6/130605196/munotinewelob.pdf
    • http://playtesters.org/uploads/1/3/0/5/130590671/mezozojuwew-gewebilevugako-kilupemukazegax-marorobi.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_off0000773a.bin
bfe6ba234d53814b4e9024514799231b6b900c7ad229a34dd3ce9762f5abe1aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773A 8324 bytes

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