Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce2aed88e794fa9…

MALICIOUS

PDF

42.5 KB Created: 2020-04-24 00:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fb74e1fd9787a166e9883d757b57d097 SHA-1: e8a5f3e6e771c48d95d948678977c2e141c7be8a SHA-256: dce2aed88e794fa9c112e960ac559d60b132e51d2c142fd020208a766165d9f5
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection mechanism. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to potentially malicious external content through these numerous links.

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://beginwelldoula.com/uploads/1/3/0/5/130541924/130541924.html#ich+gcp+guidelines+investigator%27+s+brochure
    • http://lacourgourmet.com/uploads/1/3/0/9/130968937/4161489.pdf
    • http://triplejcrochet.com/uploads/1/3/0/7/130775484/c0baf19.pdf
    • http://splashingbonaire.com/uploads/1/3/0/6/130639624/4865657.pdf
    • http://kennedyjorgensen.com/uploads/1/3/0/3/130379146/e180992ab6.pdf
    • http://ladyandthegeek.com/uploads/1/3/0/9/130969278/getilevaxaxebejoj.pdf
    • http://marlajosephs.net/uploads/1/3/1/0/131070652/kexedijux.pdf
    • http://paulburris.net/uploads/1/3/0/8/130813461/jijotafev.pdf
    • http://onalltheclouds.com/uploads/1/3/1/4/131452972/ffd89b28.pdf
    • http://gobrandwell.com/uploads/1/3/1/4/131453213/e439e652d9fed9.pdf
    • http://hoskinshoops.org/uploads/1/3/0/4/130483509/df8a4916789.pdf
    • http://hawkinsfuntees.com/uploads/1/3/0/3/130379145/6172028.pdf
    • http://colleensmithauthor.com/uploads/1/3/0/4/130476370/1b673027f4.pdf
    • http://thepoet1956.org/uploads/1/3/0/5/130588478/nafeletimosoxaz_rizunujak.pdf
    • http://mycruzada.com/uploads/1/3/0/2/130270808/vexuposuxazinida.pdf
    • http://hawkinsfun
    • 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_off000080a6.bin
c63bdb9bf39b5f067bf9d74233937679773c3631c2878883a68bc2a57e335848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A6 7320 bytes

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