Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb42349f78b913d6…

MALICIOUS

PDF

38.9 KB Created: 2020-04-01 12:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a94603735a100de01a02940203b749da SHA-1: fe660948e063dc8bed383c8b50603e19dc17ece5 SHA-256: fb42349f78b913d6759262c53166f7a2277c522daa68c3cadd21c17ea41519d1
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized with numeric slugs, indicating a link farm or SEO spamming operation. The primary heuristic 'PDF_SEO_LINK_FARM' strongly suggests this malicious intent. The ML classifier also flagged the PDF as malicious with high confidence. The document body contains garbled text and a reference to a dehydrator, which appears to be a lure to disguise the malicious nature of the links.

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://hawkapalooza.com/uploads/1/3/0/6/130622075/130622075.html#cabela%27s+80+liter+dehydrator
    • http://elotech.org/uploads/1/3/0/7/130738576/c66b7fb385.pdf
    • http://infinityinnovations.org/uploads/1/3/1/0/131070166/6361209.pdf
    • http://tomszumski.com/uploads/1/3/0/5/130543264/2a89cc6d6.pdf
    • http://investplayadelcarmen.com/uploads/1/3/0/5/130551210/cb2a8b139.pdf
    • http://internationalrelationsoxford.com/uploads/1/3/1/3/131398084/70a798fd22a.pdf
    • http://74-123-76-213.mgwnet.com/uploads/1/3/1/4/131437306/02018983.pdf
    • http://roxymiras.com/uploads/1/3/0/6/130621839/pomopamiluwa-puzodiri-zopegojev-fifaputapoki.pdf
    • http://diversitysupplier.org/uploads/1/3/0/4/130476150/lobovenobig_bogijuzivewiv.pdf
    • http://iris2017.com/uploads/1/3/0/7/130775217/7884932.pdf
    • http://aucourantimage.com/uploads/1/3/0/6/130621135/558abace986c9.pdf
    • http://lafayettemobilehomemovers.com/uploads/1/3/0/8/130813913/sanujopabo_xumuda_gavadelov.pdf
    • http://cbncsoutherncuisine.com/uploads/1/3/0/6/130640078/jitudij.pdf
    • http://vipzzevenaar.nl/uploads/1/3/0/6/130639054/b1ae09e2e.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_off00006dec.bin
68ce96363f2491cf76de68a58a34315a9ae1f141cb42b1a9ed619fcd925f378f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEC 8008 bytes

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