Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b235867e4fa269…

MALICIOUS

PDF

41.3 KB Created: 2021-05-16 17:48:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d243cc5216333ef1dd5a9adec57fa929 SHA-1: 85baf9bfcac99ed43bc359fac556fb084d6d4cc1 SHA-256: d3b235867e4fa26954d53cbadaf773cab45239525f58b85f101e7d1b4e89bcec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators'. The primary lure URL, https://netcdn.xyz/app/406889139/how-to-hack-coin-master-game-ios-game-hack, is flagged as malicious. The document body, though partially garbled, contains similar lures and embedded URLs pointing to domains like gods-own.org, which also host PDF files related to game exploits. The ML classifier strongly flagged this PDF as malicious.

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/406889139/how-to-hack-coin-master-game-ios-game-hack In PDF document text
    • http://gods-own.org/images/code-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/roblox-gang_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/rbx-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://gods-own.org/images/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/how-do-u-get-free-robux-2021_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_003_off00004794.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4794 24540 bytes
SHA-256: 032d222248bff5f9a681a91078aeede52a0648ac2c251aa02c6c02f499c9b2ef
font_01_sfnt_off00007f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8E 18140 bytes
SHA-256: b80dece7d8ec4d9222cf5aed29a2a21d72ad5f5cbe697ae1d456d8a38991e3ed

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