Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b784f4b9234ee1…

MALICIOUS

PDF

48.8 KB Created: 2021-06-04 00:49:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9ed51ffe863bab0730d5b0c2b0018d39 SHA-1: 0e87c640c257924f356b565c26cb061fa1f0748d SHA-256: 59b784f4b9234ee1f5b42e825d539ca341b7b090ef785440468580a3f12c6258
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack generators, indicating a lure for users to click through to potentially harmful sites. The document body and embedded links suggest a scam related to free game items or cheats, aiming to trick users into visiting malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/roblox-lumber-tycoon-2-hack-2021-game-hack In PDF document text
    • http://perpus.stfm.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A9 26764 bytes
SHA-256: 3069ef4ea3d443f226b9a2bf54729655ed43669a227abfb94d987ed23e501ed5
font_01_sfnt_off00008fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAC 2844 bytes
SHA-256: d4efd49219a7ff6424c923a6ccef5b7e1750ded18bbd79546f2ad196ddc76c43
font_02_sfnt_off0000996b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x996B 19164 bytes
SHA-256: 802e088aef93a95d680ae304484dabeda1eaa7442163f7e5da0c68111d7ad022

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