Malicious PDF — malware analysis report

Static analysis result for SHA-256 6945d98243e4e36b…

MALICIOUS

PDF

35.8 KB Created: 2020-03-10 03:11:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 82d7d6adf10eae3c99214cbd60207f1a SHA-1: 1012650cdde23baa666c81089a80ca86994eb9e3 SHA-256: 6945d98243e4e36b927c870c91ebfc3145f9664748371448dae296b6f61d59bf
96 Risk Score

Malware Insights

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

This PDF document was identified as malicious by an ML classifier. It contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The primary attack pattern observed is the embedding of numerous URLs, likely intended to lead users to compromised or malicious content.

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://www.secondhandfurnitureoxfordshire.co.uk/uploads/1/3/0/4/130476866/130476866.html#vcd+vocal+cord+dysfunction+breathing
    • http://cabinafotografica.org/uploads/1/3/0/4/130436037/1f359e13e25.pdf
    • http://mta-sts.oqbsvaqenuuc36zuikgkrgwftev4eslxtozlx5a5mjrh3fddp3ia.hauntedhousetour.com/uploads/1/3/0/4/130476034/6228221.pdf
    • http://lamsportstherapyyork.com/uploads/1/3/0/4/130478110/lerawoxulofamesup.pdf
    • http://ns.gametimesports.ca/uploads/1/3/0/5/130542770/703fe9bf5302e4e.pdf
    • http://howtosoul.com/uploads/1/3/0/4/130488451/5da15a83a00f.pdf
    • http://cairobritishcollege.com/uploads/1/3/0/4/130479435/559364e.pdf
    • http://fiskbuilthomes.com/uploads/1/3/0/7/130776343/zaforativasokomuk.pdf
    • http://www.combotlab.org/uploads/1/3/0/4/130483844/tagad.pdf
    • http://trentriverdesigns.com/uploads/1/3/0/3/130323115/pedabijuwewu-tivisogi-ligivosa-xuzexunubojesu.pdf
    • http://swastikpearls.com/uploads/1/3/0/6/130622083/2943476.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_off00006592.bin
934891154f3c3202095ed4319ae240a8ea6199474cabc424eb1a72a844de820d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6592 7324 bytes

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