Malicious PDF — malware analysis report

Static analysis result for SHA-256 234c88e087917e15…

MALICIOUS

PDF

24.9 KB Created: 2020-04-22 13:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e6cac45727b815906ca4d0c4b39d349e SHA-1: 51726681d3b628d83a6b0cba96f08adfa95cc8a0 SHA-256: 234c88e087917e150fcb85e10d7011c622c964781589a5a21089812b74692ee0
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are numerically or generically named and hosted on unrelated domains, indicating a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains references to 'article about social media pdf' and the wkhtmltopdf generator, suggesting a lure to external content. The presence of numerous PDF_URI and PDF_SEO_LINK_FARM heuristics strongly supports this. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://calgarybrokerageproposal.com/uploads/1/3/1/3/131384254/131384254.html#article+about+social+media+pdf
    • http://disneymovieworld.com/uploads/1/3/1/3/131380086/3f5e0da4661.pdf
    • http://coastcards.net/uploads/1/3/0/7/130775668/b6320.pdf
    • http://carpetcleaningchattanoogatn.com/uploads/1/3/1/4/131437359/2941429.pdf
    • http://cleansetocalm.com/uploads/1/3/0/7/130776200/8929142.pdf
    • http://thechefonice.com/uploads/1/3/1/4/131452732/026a90a78404de.pdf
    • http://edgemereestate.com/uploads/1/3/0/5/130539269/tefefexobexuvu-solewefere-xegekenugovuma-lidete.pdf
    • http://qbinvictus.com/uploads/1/3/1/6/131606526/visipu_wudefowabijof_lubapiv.pdf
    • http://sprinklerrepairfresno.com/uploads/1/3/1/4/131407367/3306942.pdf
    • http://munchiesbistrocafe.com/uploads/1/3/1/4/131483217/pasiletaduk.pdf
    • http://annehoitink.nl/uploads/1/3/1/4/131453573/2ba7434be.pdf
    • http://promexdistributionllc.com/uploads/1/3/1/4/131407537/sovapomofoxad-rodumizomuxoj-zezojukisikup-jetejobo.pdf
    • http://bridlewoodyoga.com/uploads/1/3/0/7/130775632/rolojet_famedivo_bexeko.pdf
    • http://mbpphotobooths.com/uploads/1/3/0/6/130605357/b445c1.pdf

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