Malicious PDF — malware analysis report

Static analysis result for SHA-256 11cad37209f3ed1b…

MALICIOUS

PDF

30.0 KB Created: 2020-04-08 15:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5d34aa428be27c8e7240974293bc5f0c SHA-1: fd51aaed32adee5b28f12a86173bcca3c8c129d8 SHA-256: 11cad37209f3ed1bdbfe1f019eb5b3f396720fe14e9b05278f70c69e0e7d0b7d
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a malicious image-only lure, typical of phishing campaigns. It contains numerous external links, including one to 'anniemarney.com', which likely serves as the initial point of contact for a phishing or malware distribution scheme. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 29 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://anniemarney.com/uploads/1/3/0/3/130323315/130323315.html#viper+alarm+installation+manual+pdf
    • http://dorrieross.com/uploads/1/3/0/6/130604886/8716654.pdf
    • http://starspangledbabe.com/uploads/1/3/0/2/130289045/9120561.pdf
    • http://oraclereadings.com/uploads/1/3/0/7/130775735/zejas.pdf
    • http://tiremhotels.com/uploads/1/3/0/6/130604859/8378758.pdf
    • http://velvetengineinc.com/uploads/1/3/0/7/130738831/7490757.pdf
    • http://mosaicinaction.com/uploads/1/3/0/9/130969343/d6429abbb5.pdf
    • http://180702883852813651.com/uploads/1/3/0/5/130551264/xudoginola.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_off0000572b.bin
f8f3f3e6a8de47e027fe77aaabd072cdeea728df556e47d03a161397dee90859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x572B 4848 bytes

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