Malicious PDF — malware analysis report

Static analysis result for SHA-256 685d5ff637e85b79…

MALICIOUS

PDF

34.2 KB Created: 2021-06-17 22:29:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8bbc2610484f8d6b24c495724b151a44 SHA-1: 698a6627a84a0917266b3b559938ffb48fbc7d95 SHA-256: 685d5ff637e85b7975c37e1ed506b571d4e37f82e1d107497841c74467a94640
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many of which are associated with game hacks and cheats, such as 'roblox-hack-apk-latest-version-game-hack'. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document body itself contains obfuscated text and URLs, reinforcing the malicious nature of the file.

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.co/app/431946152/roblox-hack-apk-latest-version-game-hack In PDF document text
    • http://agrao.in/images/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://agrao.in/images/how-to-hack-roblox-accounts-august-2021_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://agrao.in/images/roblox-se-througth-all-hack_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://agrao.in/images/im-gonna-hack-roblox_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://agrao.in/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/free-quad-bike-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://agrao.in/images/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://agrao.in/images/roblox-apocalypse-rising-hack-download_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/roblox-superhero-tycoom-free-money-command_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/roblox-hack-mega-fun-obby_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://agrao.in/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://agrao.in/images/robux-free-codigo_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
font_00_sfnt_off00002e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E23 22560 bytes
SHA-256: 3938ee91b75fef7ecff0b544fa0eadc009f80010fa9c8b44cb2f1d772f038ffc
font_01_sfnt_off0000607d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607D 19004 bytes
SHA-256: 8f3a4787418b39a5bc152f0e43c4886f59ae4d162d18d8bff0294c523dc41c8e

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