Malicious PDF — malware analysis report

Static analysis result for SHA-256 040fc2e832d6ee15…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 12:42:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 83f54e70af061192e2b43910fb326b90 SHA-1: ceea3e202db120b05ff890d1cec390a946cae0b0 SHA-256: 040fc2e832d6ee15858046ae3f393c0672cc2fbe17f9e233322e7c2755847b90
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on a link to 'netcdn.tw' which is flagged as a malicious redirector. The document body and heuristics indicate a lure for game-related cheats or generators, aiming to direct users to potentially harmful content. No scripts were extracted, but the presence of malicious links and the lure suggest an attempt to redirect users to a malicious site for further exploitation.

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/406889139/60-free-spins-coin-master-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hack-unpatched_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-apk-download-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-promo-codes-2021-july_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/earnbux-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-redeem-card-hack-pin_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hack-999999-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-that-really-works_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-cheats-csgo_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-no-nothing_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hack-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-free-download-ipad_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
stream_002_off00002f09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F09 23328 bytes
SHA-256: 4282be7de820eb64b54237626d07c4c077ba2c0fa063b07319d765cfc550f6ea
font_01_sfnt_off000063c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C5 18516 bytes
SHA-256: 9c110acbe1bdea99191041174f21e13522cf76b2385bd88ae7104caf738e615a

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