Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c19c425e7ebb26a…

MALICIOUS

PDF

36.9 KB Created: 2021-05-22 01:52:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 13cfb7140d6bcd6904a3ccb2d6f13fea SHA-1: 660eff97ff130f47499ee2274dacef1241ed8c30 SHA-256: 0c19c425e7ebb26a615b21cace0ae0b665292de03c80aa7b3a6c9a05e06d7c92
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1505.003 Client Software Integrity Validation

The PDF document contains multiple embedded links, including one pointing to a "roblox-hack-client-game-hack" URL, which is flagged as a malicious redirector. The document also contains instructions to disable security software, a common tactic to bypass defenses. The overall lure appears to be a scam related to game cheats or generators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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/roblox-hack-client-game-hack In PDF document text
    • http://www.fabbrotorino.eu/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-roblox_GM431946152.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_off0000315f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x315F 26648 bytes
SHA-256: 2c378c886b1b065ed068ee91a439a2cf6112dff166ad0c1e9ddde93fe709c593
font_01_sfnt_off00006e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E54 18408 bytes
SHA-256: 550f62bb1f49814ef42b1b735b63b4edf215944f9d7482118736a3d91d594bfc

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