Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9cebdd74028fb3…

MALICIOUS

PDF

59.3 KB Created: 2020-04-13 02:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 26da7461cc91d7c8abd837d4f9ecb934 SHA-1: b06214e6ad34f3932541de7bfc67b743de359d4b SHA-256: 0f9cebdd74028fb378e1a324febaca20262d6b5fe4b58be2e827708cb4f4841e
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many with numeric slugs, suggesting a link farm or SEO manipulation tactic. One embedded URL points to a page with a movie title, likely a lure. The ML classifier strongly indicates maliciousness, and the overall structure points to an attempt to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://christopherwyand.com/uploads/1/3/0/6/130604602/130604602.html#battle+angel+alita+second+movie
    • http://newpathorg.com/uploads/1/3/0/6/130620313/toturin.pdf
    • http://diggyshelp.com/uploads/1/3/0/7/130738956/2e54c0178c3.pdf
    • http://createdforhope.org/uploads/1/3/0/4/130483751/20eed8b192515.pdf
    • http://drvthesleepmd.com/uploads/1/3/1/3/131380885/5300355.pdf
    • http://peacefulspacesorganizing.com/uploads/1/3/0/2/130287872/zowipotatozab.pdf
    • http://effortlessexcel.com/uploads/1/3/1/1/131163744/e9f01a97eabb0b3.pdf
    • http://vhcoaching.fr/uploads/1/3/0/7/130775470/5a6b3fb2f9a42.pdf
    • http://trixiga.com/uploads/1/3/1/4/131454033/5909805.pdf
    • http://bakersfieldbreakoutzone.com/uploads/1/3/1/3/131379540/f53ad.pdf
    • http://torrancevotes.net/uploads/1/3/1/3/131398015/folavi_gutud_jadikexizoxix_jabub.pdf
    • http://brennanthefounder.com/uploads/1/3/1/4/131453018/7f793f00.pdf
    • http://caribbeanwellness.org/uploads/1/3/0/2/130289653/89bebe8f161057.pdf
    • http://lostworldsshop.com/uploads/1/3/0/7/130739026/6343037.pdf
    • http://twokindsoflove.com/uploads/1/3/0/6/130603745/5573470.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_off0000be82.bin
f494c28d165d1f4e28d6be6ca0a4ffa1ae4cffdd5ef89bf740a92df498010bfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE82 9056 bytes

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