Malicious PDF — malware analysis report

Static analysis result for SHA-256 6183ae2125af9011…

MALICIOUS

PDF

39.1 KB Created: 2020-04-10 10:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b2a88317e8a4bc53aa5a213924c554c5 SHA-1: b41f0b3b12d8ddb87349239a9ecdc4ba147e648f SHA-256: 6183ae2125af90119a36e2b94bbd81d6dd88b4b07511f78fd368612a18a3e7ad
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are structured as SEO spam, pointing to various PDF files on different domains. The document body itself contains a lure related to 'Game of Thrones' and includes a URL that appears to be part of this SEO spam campaign. The ML classifier strongly indicates maliciousness, and the sheer volume of external links suggests a malicious intent to redirect users to potentially harmful content or further stages of an attack.

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://witsetfuel.com/uploads/1/3/0/6/130640040/130640040.html#game+of+thrones+episode+4+season+8+reddit
    • http://thefestivetree.in/uploads/1/3/1/3/131381443/wavakulaniweg-riwarupeselaxov-kemusewi-gagizupebal.pdf
    • http://panicroomrva.com/uploads/1/3/0/4/130476185/5aad501.pdf
    • http://zencoffeeco.com/uploads/1/3/0/7/130775404/gilulomapilik.pdf
    • http://nwclaritymgmt.com/uploads/1/3/0/6/130620195/wujavafute.pdf
    • http://donaldhuey.com/uploads/1/3/1/4/131438420/pusobupabovuxeravif.pdf
    • http://petbedcovers.net/uploads/1/3/0/4/130488661/4885470.pdf
    • http://rockiesshrine.com/uploads/1/3/0/6/130604505/80297.pdf
    • http://annakhegay.com/uploads/1/3/0/8/130813612/88d08aaabf9.pdf
    • http://mostloyalfan.com/uploads/1/3/1/6/131637432/9196617.pdf
    • http://ezlawz.com/uploads/1/3/1/6/131636935/kegifip.pdf
    • http://wikiideasinto.com/uploads/1/3/0/6/130639386/806704.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_off000070c6.bin
90cd0fbdd06ae9572614e254746fe87f5070e46785e6c1cda4f794018d70264a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C6 7936 bytes

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