Malicious PDF — malware analysis report

Static analysis result for SHA-256 629ec5560d24c264…

MALICIOUS

PDF

36.6 KB Created: 2020-04-25 07:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0234fbb09223a371e0c33af5541b9b74 SHA-1: 21be55d62384c94cde2d0b5e68ccfaf48a753216 SHA-256: 629ec5560d24c264105dbc346e0d5618030c0fb36722dc538c785d210ee989d1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by an ML classifier as malicious and contains a significant number of external links, indicating a potential link farm or SEO manipulation tactic. The document body, though partially corrupted, suggests a lure related to 'free christmas advanced piano solo sheet music'. The presence of numerous external PDF links, such as http://tedandmasie.org/uploads/1/3/0/3/130313638/zovuvinumukerurabo.pdf, strongly suggests the document is designed to redirect users to potentially malicious content or to manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://playcamp.net/uploads/1/3/1/6/131606073/131606073.html#free+christmas+advanced+piano+solo+sheet+music
    • http://tedandmasie.org/uploads/1/3/0/3/130313638/zovuvinumukerurabo.pdf
    • http://fitzgerald-final.com/uploads/1/3/0/2/130289735/1922317.pdf
    • http://1minute-action.com/uploads/1/3/0/6/130639532/medonevabij.pdf
    • http://cubesecurity.net/uploads/1/3/0/5/130539726/boxedomez.pdf
    • http://goodlooktouring.com/uploads/1/3/0/6/130639310/1b52e.pdf
    • http://swifthop.net/uploads/1/3/0/7/130740338/rolenaxus.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_off00006770.bin
da16315eb6efbafe6a82167e433012c409f3313af2a92647819b7ada719f497b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6770 8288 bytes

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