Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d5f362c0b14e6c…

MALICIOUS

PDF

36.8 KB Created: 2020-04-12 12:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e4ceba5d20d4563288a74d7e0b484897 SHA-1: f0a8be1023743149da4142b43bf207143a8b812b SHA-256: 12d5f362c0b14e6c43cc3bdd03b24b9100729f12aa41f1f345a0bd4bb63a3870
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. These links likely serve as a lure to redirect users to potentially malicious websites for further compromise. The document body, though heavily obfuscated, contains a URL that is also listed in the heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://alenstransporte.com/uploads/1/3/0/7/130740259/130740259.html#twilight+new+moon+summary
    • http://jessicag.online/uploads/1/3/0/4/130488833/998ee8d1c25.pdf
    • http://giantacorn.com/uploads/1/3/0/7/130776264/numuzivane.pdf
    • http://usapplesupport.co/uploads/1/3/0/7/130776363/digodufinujige.pdf
    • http://myhometownad.com/uploads/1/3/0/6/130620943/1074687.pdf
    • http://exceltancy.org/uploads/1/3/0/6/130620574/jiremevibiwid.pdf
    • http://voxtw.com/uploads/1/3/1/4/131452745/poxadodiwilaxe.pdf
    • http://moodlabnewlife.nl/uploads/1/3/0/6/130605166/goditi_povababivadep_fogule.pdf
    • http://myaccsss.com/uploads/1/3/1/6/131606588/resenegidagebik.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_off000069cf.bin
76e2e46cfe47dee611f5dda9738b9bbdb09cd404ed1dc709f4d555f1c2f55d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CF 7676 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.