Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84c309d4b74e846…

MALICIOUS

PDF

43.5 KB Created: 2020-04-18 02:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d3e73cffbe134c0175bf7fa919d37026 SHA-1: ae08b3fe3f9f24179073ac4ea3a84e2b22135be2 SHA-256: e84c309d4b74e846a1dcc391498de2d41edc1b117035f3f57e61044149d4f9b5
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF sample was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The document body contains text related to 'car racing games' and is associated with numerous external URLs, many of which appear to be part of a link farm. These URLs likely serve as lures or redirect to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://thebbfoundation.org/uploads/1/3/0/2/130287488/130287488.html#car+racing+games++for+pc+apunkagames
    • http://schoolchoicevermont.com/uploads/1/3/1/3/131381052/pevufodufuketotatuda.pdf
    • http://the1500.com/uploads/1/3/0/6/130639214/mowagixim.pdf
    • http://sonomacountypp.com/uploads/1/3/1/3/131379252/2378016.pdf
    • http://constelmag.com/uploads/1/3/0/5/130539912/8010479.pdf
    • http://followingtheanchor.com/uploads/1/3/1/0/131070258/102565.pdf
    • http://falconwriter.com/uploads/1/3/0/7/130776454/rakugapegipilovifok.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_off00008283.bin
67c1607045ae6d5ab6c2abdd39e0aabfb7d603c016ca486c98120f39d3b19a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8283 8288 bytes

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