Malicious PDF — malware analysis report

Static analysis result for SHA-256 546d828bfe3fe592…

MALICIOUS

PDF

42.3 KB Created: 2020-04-07 22:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 03a6a126c2a33a8880ff95e0cebd1d95 SHA-1: 32a2b1be6eba49be0376a1a69b5bc1449a7eef04 SHA-256: 546d828bfe3fe592a12cb5fa6e3252a5dfc7cfdfa34ae670989b4626880077c6
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are structured as SEO spam lures. The document body text, though partially corrupted, suggests a lure related to a 'Subaru forester owner's manual 2017'. The PDF_SEO_LINK_FARM heuristic firing confirms the presence of a link farm, and the ML_NYX_PDF_MALICIOUS score indicates a high probability of malicious intent. The primary goal appears to be redirecting users to potentially malicious or spam-filled websites.

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://wellwithacupuncture.com/uploads/1/3/0/6/130621334/130621334.html#subaru+forester+owner%27s+manual+2017
    • http://etcheer.com/uploads/1/3/1/3/131380973/f58ef74.pdf
    • http://leocomp.com/uploads/1/3/0/6/130604675/fowugonez-zujitumot-wevavarewimaw-jepavefusix.pdf
    • http://golfputtinggames.com/uploads/1/3/1/3/131384573/7f62f89c6a0ac.pdf
    • http://integrityhomedesign.org/uploads/1/3/0/3/130379162/fafomamo.pdf
    • http://kentuckyharvset.com/uploads/1/3/0/6/130604069/4620289.pdf
    • http://covernpages.com/uploads/1/3/0/3/130323693/1022449.pdf
    • http://soultender.info/uploads/1/3/1/4/131483112/6912346.pdf
    • http://autoposst.com/uploads/1/3/0/5/130589416/zuliz.pdf
    • http://soloporque.net/uploads/1/3/0/5/130588943/83156.pdf
    • http://chattydental.com/uploads/1/3/0/7/130775889/mebijeme.pdf
    • http://fartsnap.com/uploads/1/3/0/9/130969056/6ffe3d41bd2e3.pdf
    • http://heardandunderstood.org/uploads/1/3/0/6/130620607/sapid.pdf
    • http://fitorfight.com/uploads/1/3/0/6/130604306/30ee473.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_off0000799b.bin
3ab27d89e37d95dfffd11468c3fda75cee95f703327b69a005002171189d29aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799B 9068 bytes

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