Malicious PDF — malware analysis report

Static analysis result for SHA-256 315a5e0b7014a52c…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 14:21:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 04e567ba674e6bc17e657af31a795b7d SHA-1: d80fb71622b011f4440bdaa8d0bca152f28f00b4 SHA-256: 315a5e0b7014a52c66474e4c1e5668573c7f707a68ecbe056f098f3b0fcbc09a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier strongly flagged this PDF as malicious. The embedded URLs are designed to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

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/431946152/earnrobux-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/cool-cheat-engine-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/rape-simulator_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-jailbreak-free-money-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-diamond-finder-hack_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
font_00_sfnt_off00002e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3A 23364 bytes
SHA-256: 884244559d68be3dfc5bcf86dfd7f9090204663cbef372d7f4ac2d1ef31a61d8
font_01_sfnt_off000061ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AE 18552 bytes
SHA-256: 6794fc7ee49cdd0a33f98bbbc8a763353555002210e507bd98e2a39f67d6f290

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