Malicious PDF — malware analysis report

Static analysis result for SHA-256 95636ddff1bc4457…

MALICIOUS

PDF

41.8 KB Created: 2020-05-31 02:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0c243a3939a1de03ca7f1534b5c77f5 SHA-1: ee9f20b3c16a5d376e442cf26676d9c0bece65ac SHA-256: 95636ddff1bc4457ec8d1357be149448ac8d2fcdbe2a8711dae9018e90a4a7d7
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to PDF files hosted on various domains. The primary lure appears to be related to 'Ducati scrambler cafe racer release date', directing users to a specific URL. The ML classifier strongly indicated maliciousness, and the heuristic firings suggest this is a link farm or SEO poisoning technique designed to drive traffic to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://mx.constantineking.com/uploads/1/3/1/4/131438193/131438193.html#ducati+scrambler+cafe+racer+release+date
    • http://flowpros.solutions/uploads/1/3/0/7/130739133/fbbd8818078aa11.pdf
    • http://kpmechanical.ca/uploads/1/3/1/4/131454114/xanawijuvofuz-gowojukajak-soxofa-kibajo.pdf
    • http://clarkeessentials.com/uploads/1/3/0/9/130969148/nixiwaluvuk_dumatodotib_borise.pdf
    • http://lindensfresh.com/uploads/1/3/0/8/130873822/5994335.pdf
    • http://serruchop.com/uploads/1/3/0/6/130621588/domevem.pdf
    • http://nicolebonder.com/uploads/1/3/0/7/130776861/basaweraxutijikebuv.pdf
    • http://cowboyentrepreneur.net/uploads/1/3/0/9/130969727/jesoriji.pdf
    • http://rkcs.ca/uploads/1/3/0/2/130273624/tapupexojabukow_vozonolebov_dusoni.pdf
    • http://flowpros.solutions/uploads/1/3/0/7/130739133/fbbd8818078aa
    • 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_off00007243.bin
75a5d52686571767afeebc86e358d21e51f957243051260d7228a0ccb353e6a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7243 12256 bytes

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