Malicious PDF — malware analysis report

Static analysis result for SHA-256 f930b197a2417221…

MALICIOUS

PDF

29.8 KB Created: 2020-04-23 12:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 126d5c027244f9d9c2cd774729c9d388 SHA-1: 1ab4e202df2544288e03bee4d632ab581673834d SHA-256: f930b197a24172216f2eb132b0fbd0d187e9035ece66fb7a617521465da65c9f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

The PDF file was flagged by an ML classifier as malicious. It contains a significant number of external links, many of which point to domains that appear to be part of a link farm designed to obscure the ultimate destination. The presence of a large number of these links suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://daisydesignandgifts.us/uploads/1/3/1/3/131382680/131382680.html#avision+scanner+software
    • http://lipscombacademypto.org/uploads/1/3/0/4/130488811/negulamiralob-jenifakag.pdf
    • http://bencs21.com/uploads/1/3/0/7/130738884/kenudomusotava_zivivina_tisejomifozug_vidujuveden.pdf
    • http://shanesmi201.blog/uploads/1/3/0/7/130738693/rosifeguf-kunamiz-pasezibigazevin-ramiforuk.pdf
    • http://perspectivesigns.ca/uploads/1/3/1/4/131453026/wufajatakumodi.pdf
    • http://yourtrinitywellness.com/uploads/1/3/1/4/131437567/5097772.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_off00004eae.bin
af93774c68dc52f94034c1b3a54809d9a8b9513b7c7f53b04bb00a60e30c7cac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EAE 7364 bytes

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