Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f23560bd1834984…

MALICIOUS

PDF

31.8 KB Created: 2020-04-05 16:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 584a19f9af8d5d7c439143aff85411b0 SHA-1: 7a153d6f69c4251013fe2bcffced6bd13137e0ec SHA-256: 0f23560bd1834984acd444face1f27779dd79343654a27f9788605ce944dd7f8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, identified by the 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. The document body, though partially corrupted, suggests a lure related to a 'Final cut pro 7 manual'. The ML classifier strongly indicates maliciousness. The embedded links likely lead to a phishing or malware distribution site, attempting to exploit user interest in the manual.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ne-surgerycenter.net/uploads/1/3/1/3/131380811/131380811.html#final+cut+pro+7+manual+en+espa%C3%B1ol+pdf
    • http://cspdbi.com/uploads/1/3/0/7/130740455/41465b95374357.pdf
    • http://abundantlifefamily.net/uploads/1/3/0/3/130312961/8055848.pdf
    • http://elektrotickets.com/uploads/1/3/0/7/130739653/javegokofuroga_renuxowed.pdf
    • http://chimyst.com/uploads/1/3/1/4/131438453/losarutudune.pdf
    • http://prolabsau.com/uploads/1/3/1/4/131407179/4d9d188223.pdf
    • http://redwoodcoastaccounting.com/uploads/1/3/0/5/130539992/6419744.pdf
    • http://optodyce.com/uploads/1/3/0/7/130776641/fofufuvavefuxesom.pdf
    • http://vintagehomegreensboro.com/uploads/1/3/0/5/130551788/mujobapasuk-dawodafozabose-gedoj.pdf
    • http://thebamboopouch.co/uploads/1/3/0/4/130476814/7263907.pdf
    • http://coldwatercollections.com/uploads/1/3/0/6/130620701/teluninixozaper.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_off000053c4.bin
7fcbf872b09a3b15c02f89bd313dd5423cd97adcabc408ad1424ee9b420a1b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C4 7644 bytes

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