Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78652e969c9afc7…

MALICIOUS

PDF

38.3 KB Created: 2021-06-04 02:54:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1a600c85c59415ae56778282e55fca9b SHA-1: f2e669aee8d2d1f3be1991afb8b6fa08afbef11f SHA-256: c78652e969c9afc7af3d30cf72068c9a4f037e22e73ec3dbca07f969d7fa782c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The document body and embedded artifacts also contain references to this URL, reinforcing the malicious intent. The embedded URL is designed to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0331

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://netcdn.online/app/479516143/minecraft-115-2-hacks-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00003b08.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3B08 25092 bytes
SHA-256: 1c6f5b4978db005c9130e87547ca87a30a0088d276ac4695255b1e9f526b6ec5
font_01_sfnt_off000074d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D1 18100 bytes
SHA-256: 2d3b27b408d3f739dac69892bb77828e37852eeadeb3aca8b5b98d14a7739d0d

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