Malicious PDF — malware analysis report

Static analysis result for SHA-256 656fefdabd5adb7f…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 16:31:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6916267975a508e52a22e0d8cf2bbf6d SHA-1: 360a33d8d4b3043285ccb001c4f23d6cb6b18eeb SHA-256: 656fefdabd5adb7feee6f384d22828cc1258d73f32c1bd52327398fb11e314dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically targeting users interested in game hacks and free in-game currency. The heuristic firings indicate that these links lead to known malicious redirectors and are designed as lures. While no scripts were directly extracted, the nature of the links suggests a potential for downloading further malicious content or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-do-u-get-free-robux-game-hack In PDF document text
    • http://parsbaft.com/images/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://parsbaft.com/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-free-spins-cheat-deutsch_GM406889139.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_003_off000047f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F0 25492 bytes
SHA-256: da5dc2058c955829c798eb264fd0e8786bdaf0469099f30687e5772b87fcef53
font_01_sfnt_off0000829d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829D 18636 bytes
SHA-256: ab6f51fdb1eed883fd21dff3bd0336e3a1b816e6c21a8924207bfe84ed9a007e

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