Malicious PDF — malware analysis report

Static analysis result for SHA-256 31af3e0f62257a43…

MALICIOUS

PDF

45.2 KB Created: 2020-06-21 07:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 004d0e9ae6d0769dc0e63ff2f35f8053 SHA-1: 9c263de727e90c6589b109f857188e93f20b5e1c SHA-256: 31af3e0f62257a43b0818fa1fef4e1758b609c36d283bcae56177e0eb947577a
92 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its structure, which includes a large number of external links to other PDF files, characteristic of a link farm or SEO poisoning attack. The document body contains text related to a 'Canon digital ixus 850 is manual', likely a lure to entice users to click on the embedded malicious URLs. No scripts were extracted, but the PDF_SEO_LINK_FARM heuristic indicates the primary malicious function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • 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
  • 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://hostmaster.artincanterbury.co.uk/uploads/1/3/0/2/130289278/130289278.html#canon+digital+ixus+850+is+manual
    • http://58west58.com/uploads/1/3/0/7/130740148/jadikisefume-moxuladuvaroga-difijisimi.pdf
    • http://queenbeemkt.com/uploads/1/3/0/8/130813362/88b4ac0.pdf
    • http://mta-sts.csraseniorsgolf.org/uploads/1/3/0/3/130379466/bikirunar_limimakesin_raxew_difapube.pdf
    • http://hostmaster.lutheroratoriumkleeb.de/uploads/1/3/1/8/131856491/64ee998ee7.pdf
    • http://guitargopherblog.com/uploads/1/3/0/6/130620248/jeneviba.pdf
    • http://spanish.blueoceantechnology.no/uploads/1/3/0/6/130603937/1e55e5f.pdf
    • http://4k4.undesirable.us/uploads/1/3/0/2/130288381/8385801.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007119.bin
9b1bc483305c8e85a85fdbd3012c8827c9ebc499993cd6a0fe0b5ec8be70a316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7119 5364 bytes
font_01_sfnt_off00008340.bin
270f54d4eb00f9fb841bc330e1a8799adab10b5bedaa7d03796b1373d4e9972f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8340 11164 bytes

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