Malicious PDF — malware analysis report

Static analysis result for SHA-256 3415d429478e7511…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 20:29:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e97a45fd55b66d5fc071534cd44dd414 SHA-1: 044500d2a5fbdf5e55b0685ceff94d0328da684f SHA-256: 3415d429478e7511668d0d91eb38ca19652191dbda7791e522b829568715b6db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'free generator / game hack' lures for popular games like Roblox and Coin Master. The presence of these links, combined with the ML classifier's high confidence score, indicates a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

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/robux-robux-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-do-you-get-robux-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-gamemodes-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-game-items-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-girl-shirts_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-dominus-empyreus-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-help-free-robux_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_off00002e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3B 22560 bytes
SHA-256: d3f75445f151d7c0ff8b5470aaaf77b8d4b7e0063747492d6fab5d0ec67f9d8f
font_01_sfnt_off000060bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 18552 bytes
SHA-256: 8ba2fbf58aebc490c43326e72b806663acbcef1fd8204dd81cc44ebbb8493521

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