Malicious PDF — malware analysis report

Static analysis result for SHA-256 b080e5729b9aae92…

MALICIOUS

PDF

42.6 KB Created: 2020-03-31 07:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: af12adbf6cc61000acb1cf2e0db19677 SHA-1: c6d4333d2eda41634e784c09a4cabd0517f89687 SHA-256: b080e5729b9aae9206e30c5a938d467f03d46bfccb36136c5c9623f925e2c638
92 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO poisoning and driving traffic to malicious sites. The document body, though heavily obfuscated, contains text referencing 'Subway surfers cheats for iphone', suggesting a lure to attract users interested in such topics. The PDF_SEO_LINK_FARM heuristic firing confirms the presence of a link farm, indicating a malicious intent to redirect users. The ML_NYX_PDF_MALICIOUS score further supports the classification of this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://omega-response.org/uploads/1/3/1/4/131408546/131408546.html#subway+surfers+cheats+for+iphone
    • http://mercerlanecollective.com/uploads/1/3/0/5/130543848/1337409.pdf
    • http://kelseyschobert.com/uploads/1/3/0/5/130550995/3df29c4e921a35a.pdf
    • http://michaelsilveyiptec.com/uploads/1/3/0/6/130639975/nukob.pdf
    • http://qweries.org/uploads/1/3/1/4/131408241/a3e1e.pdf
    • http://thinkproductconsulting.com/uploads/1/3/0/6/130640198/112866.pdf
    • http://wrapnation.com/uploads/1/3/0/5/130550711/zabori-rumube-zufasuwogok.pdf
    • http://gurdeepjuttla.com/uploads/1/3/1/4/131413362/jigoninamido.pdf
    • http://longtermrentalscostarica.com/uploads/1/3/0/8/130813997/e02555e20.pdf
    • http://ktowncuisine.com/uploads/1/3/0/8/130814992/48baaeb.pdf
    • http://377844335453141080.com/uploads/1/3/0/3/130324331/xujud.pdf
    • http://oncallrn123.com/uploads/1/3/0/5/130551257/1197567.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_off0000685e.bin
007e001f886b93f62b91f6e41c01ac4571819883bec4eca8cd2a30dce5c9c14c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x685E 8280 bytes
font_01_sfnt_off00008871.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8871 16036 bytes

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