Malicious PDF — malware analysis report

Static analysis result for SHA-256 00841ffcbcb83909…

MALICIOUS

PDF

39.6 KB Created: 2020-03-10 02:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 82608e679609a983cc60ae79189caf0c SHA-1: db57158bebd3c0eefbb00c47285b817d59868202 SHA-256: 00841ffcbcb83909c1753554beb89db9cb9cee8f0102e8318bc48dd9c7c91a3e
104 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or redirecting users to malicious content. The heuristic 'SE_INVOICE_LURE' suggests a deceptive pretext, likely to encourage link clicks. The ML classifier strongly indicates malicious intent, and the presence of many embedded URLs supports a link-farming or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://dedicated-8.pleasingfood.com/uploads/1/3/0/7/130740082/130740082.html#amortization+schedule+balloon+payment+interest+only
    • http://www.boweltolerance.org/uploads/1/3/0/4/130488498/kisarazekos-parezoji-vikuzexexo.pdf
    • http://geniusplayground.com/uploads/1/3/0/6/130640081/219779.pdf
    • http://mtglend.net/uploads/1/3/0/8/130814562/moduji.pdf
    • http://hostmaster.carolarnott.com/uploads/1/3/0/3/130323794/vuwiwodafovajadanu.pdf
    • http://www.northpointetravel.com/uploads/1/3/0/7/130739294/5133630.pdf
    • http://pingjiazuihaodeqipaiyouxi.br3h.com/uploads/1/3/0/3/130323630/movowududu.pdf
    • http://coopersflamethrower.com/uploads/1/3/0/2/130287457/c3ac9179f8b0.pdf
    • http://cjscountryboutique.com/uploads/1/3/0/2/130288639/befugewaxodibevuse.pdf
    • http://hopehelps.ca/uploads/1/3/0/7/130776078/5082058.pdf
    • http://frippventures.com/uploads/1/3/0/5/130588511/bojuneko.pdf
    • http://philipflorio.club/uploads/1/3/0/4/130435929/6318629bce69c.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_off000070cb.bin
b6f4c2c560632ef1b5d773e9aa8d79afa0d757bd42bf5b774bf346edd1aaeb91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CB 8544 bytes

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