Malicious PDF — malware analysis report

Static analysis result for SHA-256 9513ab6ff5e43344…

MALICIOUS

PDF

72.8 KB Created: 2020-06-04 03:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a63f9d86a9cd6ae1ed131e75e86fffa5 SHA-1: 4f02f524ebbeaed65f45a095cf99dccc7f665db4 SHA-256: 9513ab6ff5e433441b83ac346e6d80fc0b5c323670e1f5545c2e8ddbbfa99544
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on various domains, suggesting a link farm or SEO abuse tactic. The document body, though heavily obfuscated, contains a reference to 'jhene aiko wading free mp3 download', indicating a lure for users searching for such content. The ML classifier strongly flagged this PDF as malicious, and the heuristic firings confirm the presence of a link farm and external URIs, supporting the conclusion that this document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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
  • 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://balloonworxx.com/uploads/1/3/0/6/130605258/130605258.html#jhene+aiko+wading+free+mp3+download
    • http://honeylemonboutique.com/uploads/1/3/1/0/131070771/ec4cc708.pdf
    • http://hostmaster.pwrrtigers.com/uploads/1/3/0/6/130604657/80b2554a912.pdf
    • http://tonecontrols.org/uploads/1/3/0/6/130621353/2802457.pdf
    • http://dklimek.com/uploads/1/3/1/3/131398185/1399951.pdf
    • http://santaanapoolcleaning.com/uploads/1/3/1/6/131636922/wibawepijik-kedixulipawakaz.pdf
    • http://apexplacementaz.com/uploads/1/3/1/3/131379213/5625866.pdf
    • http://ultim8adventure.com/uploads/1/3/0/7/130738883/toxenavetegebes_donuz.pdf
    • http://criticalcaremcwicu.com/uploads/1/3/0/4/130476564/votekalodazo_telotut_duvoke.pdf
    • http://balloonworxx.com/uploads/1/3/0/6/130605258/terms.html
    • http://balloonworxx.com/uploads/1/3/0/6/130605258/dmca.html
    • http://balloonworxx.com/uploads/1/3/0/6/130605258/policy.html
    • http://tonecontrols.org/uploads/1/3/0/6/130621353/2802
    • https://futuxew.files.wordpress.com/2020/06/14522274799.pdf
    • https://gedukajira.files.wordpress.com/2020/06/35839777063.pdf
    • https://forenuxi.files.wordpress.com/2020/06/biduxuwomaraxe.pdf
    • https://zurejopunigo.files.wordpress.com/2020/06/teturizeparixidelibop.pdf
    • https://didototufuto.files.wordpress.com/2020/06/89804205841.pdf
    • https://najobiwobusu.files.wordpress.com/2020/06/jokudirepex.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_off0000edcb.bin
467271c3fef04f2889fd7dd61971b27ec1d67c5265cd7ac2ab551181ee6163db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 12272 bytes

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