Malicious PDF — malware analysis report

Static analysis result for SHA-256 484765891be06484…

MALICIOUS

PDF

29.7 KB Created: 2020-03-25 02:05:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ce77447ecd41206fba811cd8c46f7b2f SHA-1: 94abd6d62e2b9b59fe81b0d706b8ae3848c0757e SHA-256: 484765891be0648470e3567d61a8b40c3f34526443ee321fdfc46ff00f7a845c
94 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to various domains, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the heuristic rules confirm the presence of numerous external links, suggesting a coordinated effort to distribute content or traffic. No scripts were extracted from this sample.

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://wagenselleryoga.com/uploads/1/3/0/7/130738949/130738949.html#growing+elite+marijuana+ebook
    • http://nancebmecleaning.com/uploads/1/3/0/5/130590410/xipale.pdf
    • http://sleepdex.com/uploads/1/3/0/5/130539131/kemilede.pdf
    • http://alangelfand.com/uploads/1/3/0/2/130271019/linorave-jolaso-posav.pdf
    • http://657maidmarion.com/uploads/1/3/0/8/130813332/cf260b2dc149.pdf
    • http://coverofblue.com/uploads/1/3/0/5/130545334/lizibazukafom.pdf
    • http://mattsfavoritethings.com/uploads/1/3/0/7/130739814/nugefabelupupi-bibix-benab-beledagoziboza.pdf
    • http://greatwhitespoolclub.com/uploads/1/3/0/4/130488362/8ac1f6.pdf
    • http://maxpromo.org/uploads/1/3/0/7/130776659/mozoditata_vezijozatide.pdf
    • http://rhs55.net/uploads/1/3/0/5/130539035/9167582.pdf
    • http://pdjlawyer.com/uploads/1/3/0/4/130483205/famekajuxuzuzara.pdf
    • http://www.2am-epiphany.com/uploads/1/3/0/7/130776571/d62a82.pdf
    • http://envirenu.biz/uploads/1/3/0/2/130289173/jovuguv-gaxerixupo.pdf
    • http://www.sparrowsarrows.com/uploads/1/3/0/6/130620881/bojosuvi.pdf
    • http://churchofchristevangelismreport.com/uploads/1/3/0/2/130272282/4a5ccd3f02460.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_off000051e6.bin
0e2d366268ca7a93d7bb96d7e7212bd931126cee7ece27bbeab0dc50c7feb7bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E6 5876 bytes

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