Malicious PDF — malware analysis report

Static analysis result for SHA-256 3584ee7a971475e6…

MALICIOUS

PDF

30.9 KB Created: 2020-04-17 13:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0cdeb144d0536c2e4e99c426411c2b18 SHA-1: a39dacbe655d794d1fd91ef06417076624ae5dbc SHA-256: 3584ee7a971475e62fd403de502ab17470171ca1c03bacda90785bea8bbc4009
94 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which are hosted on domains designed to appear legitimate but lead to potentially malicious content. The 'PDF_SEO_LINK_FARM' heuristic indicates a deliberate attempt to create a large number of links, likely for SEO manipulation or to host various payloads. The document body, though partially corrupted, references 'Bizerba se12d operating manual', suggesting a lure to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://cozmomcares.com/uploads/1/3/1/4/131437317/131437317.html#bizerba+se12d+operating+manual
    • http://bhfevv.org/uploads/1/3/1/4/131408298/8159035981b.pdf
    • http://curatolaomundsencontracting.com/uploads/1/3/0/4/130476157/0a93c46f8.pdf
    • http://michigansunriseagency.com/uploads/1/3/0/5/130543685/2525237.pdf
    • http://fifthelementcoffee.net/uploads/1/3/0/4/130436234/vonowuvin.pdf
    • http://westchesterfatfreezing.com/uploads/1/3/0/7/130776605/38793b5e4f.pdf
    • http://theseven16live.com/uploads/1/3/0/6/130621790/ab9781f718ef2e.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_off00005186.bin
026f322dfd59f1564fa470f555b9813e95927b50163c4a9267e9d5a87ef6241f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5186 7980 bytes

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