Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e662c59844b5f5…

MALICIOUS

PDF

43.7 KB Created: 2020-04-13 20:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 185391e3e1b487b95a0609ab82c69576 SHA-1: 6f7d144dba68e5f59060dc67dbe07ed25ad76a19 SHA-256: 27e662c59844b5f5894a689726e1f9dbf700ae77fa71c4dbb92e2bc65039d301
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly identified this PDF as malicious. The embedded URL and the heuristic firings indicate that the primary function of this document is to redirect users to potentially malicious external content, likely for phishing or malware distribution.

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://marengineering.net/uploads/1/3/1/4/131437648/131437648.html#cara++animasi+powerpoint+bergerak+gif
    • http://zacharyplysfreeman.com/uploads/1/3/1/1/131163599/1681605.pdf
    • http://agentoftaste.com/uploads/1/3/0/5/130540525/8c2e52af.pdf
    • http://flairclubmilano.com/uploads/1/3/0/6/130639335/kidegalivemik.pdf
    • http://buykaizensolutions.com/uploads/1/3/1/0/131070539/ddd6427b9726.pdf
    • http://janineibbotson.org/uploads/1/3/1/4/131438587/4a6ea945eea79be.pdf
    • http://balicahayadwipa.com/uploads/1/3/0/6/130639849/tozuvababulok.pdf
    • http://cordofcallowsdocumentaryfilm.com/uploads/1/3/0/8/130813757/8dadd400.pdf
    • http://theforgegaming.store/uploads/1/3/0/6/130621303/1576780.pdf
    • http://restauracjaureni.pl/uploads/1/3/0/6/130639545/1885108.pdf
    • http://davideortega.com/uploads/1/3/1/3/131398131/lewuz.pdf
    • http://jonathanhallpainting.com/uploads/1/3/0/7/130776233/mujurebiniguvosiz.pdf
    • http://jcarchitectspc.com/uploads/1/3/0/8/130874529/9713021.pdf
    • http://framingmediadevelopment.com/uploads/1/3/0/7/130740385/mukedowanabamokunaf.pdf
    • http://rzfigueroa.com/uploads/1/3/0/4/130436196/e5be11fc.pdf
    • http://areyouoffset.com/uploads/1/3/0/3/130313161/zapuviwinomoz-dabojapo-reruf-golisusete.pdf
    • http://framingmediadevelopment.co
    • 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_off0000834f.bin
c9f6d72027c4ec214a2f28dbb50a3fed7de7431434d2dc43b2733d6e85e2afe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x834F 7996 bytes

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