Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9da99d7e36ed949…

MALICIOUS

PDF

35.3 KB Created: 2020-04-28 17:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d1351df523ea4d2160d9ae58d69df19f SHA-1: 7301226e765aa2b0b8f779f93794e0dd8566166e SHA-256: d9da99d7e36ed949b1a43085c341732e2be7c2ea861ab90e753449d8e04f3e4d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier also strongly flagged this PDF as malicious. The embedded links likely serve to direct users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://sixwaystrading.net/uploads/1/3/0/4/130483062/130483062.html#cliffhanger+imdb+parents+guide
    • http://corefarmscsa.net/uploads/1/3/1/6/131637239/bfb4d4fcd914.pdf
    • http://naimstaff.com/uploads/1/3/1/4/131410597/vitunazuv-tajezani-nufata.pdf
    • http://2001ndivisionharvard.com/uploads/1/3/1/3/131379118/jubusowuzor.pdf
    • http://pineridgeplumbing.com/uploads/1/3/0/8/130874585/kepimazijefiv-budari-lavejepodej.pdf
    • http://truefertilitysc.com/uploads/1/3/0/6/130621934/9340865b4ea4a03.pdf
    • http://favoredunderfire.com/uploads/1/3/0/9/130969046/1171069.pdf
    • http://trackingcme.com/uploads/1/3/0/4/130476114/zuvomaxefu.pdf
    • http://libreriajerusalem.com/uploads/1/3/0/5/130589121/kamitifavefizo-zalususix-nigurerepozere-fojaxoguxite.pdf
    • http://ayerpublicaccess.org/uploads/1/3/0/7/130775014/xurademefesolimilari.pdf
    • http://lumenlux.info/uploads/1/3/0/8/130813496/pujenumogafaviv_xabafevujeriz_likobekurug.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_off000060c3.bin
91903168024fa9b2c486adffcb8d446affbb29989abf086d8dd664fb76699dc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C3 8388 bytes

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