Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34f4f0cbd331e86…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 23:41:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 533700725eb1dba66b29b06b7fe254bb SHA-1: a82f4d3d8658400301491301a06c301a6e26457c SHA-256: d34f4f0cbd331e866c9128e2507ab6ff9d1ba3dbee58574426d795b76191399c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users into clicking on what appears to be game hacks or free spin generators. The primary malicious link, http://netcdn.tw/app/406889139/coin-master-links-for-free-spins-2021-game-hack, is designed to lead users to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-links-for-free-spins-2021-game-hack In PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/hacks-for-roblox-for-craftwars_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/robux-hack-opprewars_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/como-tener-dinero-infinito-en-jailbreak-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-tutorial-hack_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-roblox-obbys-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/buy-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-games-that-you-can-play-online-for-free_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-one-piece-legendary-hack-devil-fruit_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-robux-giver-free-download_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/can-you-really-hack-coin-master-ios_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
font_00_sfnt_off000031f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F1 22496 bytes
SHA-256: b5062a0abb4fec29bd974a65c2cbe2e4d5913614d584dc5282be8a6621b55af3
font_01_sfnt_off0000641f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641F 18748 bytes
SHA-256: 8d119a4c648bdbcdb702e6b2637ce89b675d402599e3c746c9fba888505a2c80