Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b56fef2c71b553…

MALICIOUS

PDF

35.6 KB Created: 2021-05-21 00:35:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 164a57c260be54f03657a45074d04bb0 SHA-1: 508657b9d88c80445a09181cde1b816a69d8f02e SHA-256: 23b56fef2c71b55307cc108f08ca37c4fe943a8b0050bf671d6c53290f4d9277
160 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector domains, including one identified as malicious infrastructure. The document body and heuristics indicate a lure for a "game hack" or "generator", suggesting a social engineering tactic to trick users into visiting malicious sites. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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.xyz/app/431946152/blox-pink-robux-free-game-hack In PDF document text
    • http://rosadent.com/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://rosadent.com/images/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://rosadent.com/images/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://rosadent.com/images/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://rosadent.com/images/free-bedrock-minecraft_GM479516143.pdfIn 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_002_off0000309f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x309F 24892 bytes
SHA-256: 6e3a3cde48d29ebcc632c5bb996e5a1e83be1af07c6d92a8e440b7db03d1047c
font_01_sfnt_off0000696b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696B 18532 bytes
SHA-256: 83476c1cdc4965e32c1b031adf165cbdabd52b50c1595b7bdd37ea4d9a1aed4b

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