Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c15d11b5ff7151…

MALICIOUS

PDF

27.8 KB Created: 2020-04-07 10:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0315d62dd60ec120ffc4de87b29751b1 SHA-1: 95bd79619263fe85e4605260c9f7a756f3cbad12 SHA-256: b4c15d11b5ff7151d45040d55f3c751edc4b25dfda6c2c2abb8969a28b01f0dc
92 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to URLs that appear to be part of a link farm or SEO spam campaign. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a luxury watch, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://joebidenthepedophile.com/uploads/1/3/1/4/131438823/131438823.html#tag+heuer+aquaracer+chronograph+black+dial
    • http://tcyfco.org/uploads/1/3/0/5/130589008/nitut.pdf
    • http://themarketingowl.net/uploads/1/3/0/4/130483086/parifafonubefum.pdf
    • http://heetbeeter.com/uploads/1/3/0/7/130776460/jemivafevidizi.pdf
    • http://philanthroman.com/uploads/1/3/0/6/130639563/kuvakipegel.pdf
    • http://nolatourhub.com/uploads/1/3/0/3/130379297/7581472.pdf
    • http://chinatownsf.org/uploads/1/3/0/8/130815277/1090091.pdf
    • http://weeblackbook.com/uploads/1/3/0/9/130969332/wirenexowi-xafipetate-tozituwako-tonifelafijozit.pdf
    • http://stevengournay.com/uploads/1/3/0/2/130289220/8823711.pdf
    • http://karepeople.net/uploads/1/3/0/4/130483422/4191414.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a99.bin
b247713c7d822b0980e5584edb9502717ef3c589e70bd7d57e0b3401c5ebf6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A99 6996 bytes

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