Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f80553b0ec5dde…

MALICIOUS

PDF

39.0 KB Created: 2020-03-30 23:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fa9c6aaca7484c6ecadacd96775bc803 SHA-1: 6699407fcf02c4dbc4b0ec5624128c418349f9db SHA-256: 12f80553b0ec5dde168a978988a78d77b294dab4362c3cd894336e7c385c06f9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to lead the user away from the document. No scripts were extracted, but the PDF structure itself is indicative of a link farm or redirection scheme.

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://djspizza1.com/uploads/1/3/0/8/130813314/130813314.html#ts+420+stihl+cutquik+price
    • http://bodycandybycarter.com/uploads/1/3/0/6/130621826/7108792.pdf
    • http://harmonscustommadegrills.com/uploads/1/3/0/6/130603779/49beb4.pdf
    • http://digitalveriteproductions.com/uploads/1/3/0/7/130740141/9424481.pdf
    • http://baffen35.com/uploads/1/3/1/0/131071289/9285443.pdf
    • http://mypropertyinmiamidade.com/uploads/1/3/0/5/130540097/a3f17d42968e972.pdf
    • http://chris-electric.com/uploads/1/3/1/3/131380591/demokutubojow.pdf
    • http://www.autohaus-hollenstedt.com/uploads/1/3/0/5/130542755/bugotazim.pdf
    • http://nationalchristianhousingconference.org/uploads/1/3/1/4/131407235/bf321a6e296d80.pdf
    • http://leregoleditozzimagazine.com/uploads/1/3/0/7/130775474/9023514.pdf
    • http://auroraenergyresearch.info/uploads/1/3/0/3/130313595/sagavepegimapon.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_off00006f0a.bin
eca294fbcf9be8556d7dee19981b6a06b45e1cb3e2867518c200c26262a4ef38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0A 8036 bytes

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