Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9dbe68d141fd7f…

MALICIOUS

PDF

55.0 KB Created: 2020-06-21 07:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b2f9ca10b014ac3043731f89434e591 SHA-1: 9aff601fe08e65efda5399c44ba81d60bd80d506 SHA-256: 3a9dbe68d141fd7f727831c8292dbf4df5339e1b3ebb2731ab55fad698a81459
92 Risk Score

Malware Insights

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

The PDF document contains a lure related to a 'Troy bilt gas pressure washer manual' and embeds a large number of external links. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a malicious SEO or content distribution scheme. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the extensive link farm points to a delivery mechanism for potentially malicious content hosted on external domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://moneymatchgaming.com/uploads/1/3/0/6/130639733/130639733.html#troy+bilt+gas+pressure+washer+manual
    • http://amelioration-personnelle.com/uploads/1/3/1/1/131164431/fuvesudi.pdf
    • http://prasquad.com/uploads/1/3/0/6/130620838/lizusizeto.pdf
    • http://tummyfixtea.com/uploads/1/3/1/3/131383398/nokim.pdf
    • http://redvitalize.com/uploads/1/3/1/4/131437457/nekinuverura.pdf
    • http://oxfordshirekickboxing.com/uploads/1/3/1/0/131069819/30d154.pdf
    • http://sbjoinery.net/uploads/1/3/1/3/131398347/rezomamedejokobu.pdf
    • http://unidossupermercados.com/uploads/1/3/1/3/131383319/jorezumos-kegavis-ginuwirola.pdf
    • http://onestopindustrial.net/uploads/1/3/0/8/130814011/wadoxebewubafi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009570.bin
89be74407d021362811dcfaa552a10e19c96862c72ce921c5d87c353a601c418		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9570 5400 bytes
font_01_sfnt_off0000a7b8.bin
a26bc60f368cf9156d16f3abd6640b095a2b82d3ff09aebabced4c6109864c34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B8 12048 bytes

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