Malicious PDF — malware analysis report

Static analysis result for SHA-256 283bdc67d2698526…

MALICIOUS

PDF

54.6 KB Created: 2020-04-08 00:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fc3244c444fa6239c6f2b99bb7b6cf88 SHA-1: 48eadddd37fea15c2b6991375cbb0d052dd52e8a SHA-256: 283bdc67d26985262e66be3711965f92d3c65584c673103e53e17e21218b5020
94 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier with high confidence. It contains a large number of external links, characteristic of a link farm or SEO poisoning technique, designed to lure users to potentially malicious domains. The document body contains obfuscated text and URLs, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jemfloorcovering.co/uploads/1/3/0/5/130540017/130540017.html#pathfinder+human+paladin+favored+class
    • http://driveaware.com/uploads/1/3/0/6/130605156/6ab3b1ecd380c25.pdf
    • http://agilenv.com/uploads/1/3/0/2/130272332/boturuwewo_fuxuk_wexine_sojubu.pdf
    • http://globalwindowcoverings.com/uploads/1/3/0/2/130288465/jegaz.pdf
    • http://sfpdpark.org/uploads/1/3/0/9/130969391/bosetixemed.pdf
    • http://devongoldmakeup.com/uploads/1/3/1/4/131453429/pumosabawum.pdf
    • http://goodstreetbaptistchurch.net/uploads/1/3/0/7/130775912/gamujarozez.pdf
    • http://almacardenasbrothersaginc.com/uploads/1/3/0/6/130605517/foxoledobigaroxajav.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_off0000aa76.bin
c08037bafa72ba38ffbcd28bee8b6b17017d76e72757e6fb9e38d632e8f84dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA76 8716 bytes

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