Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17bc8e7f4091c87…

MALICIOUS

PDF

48.2 KB Created: 2021-06-14 01:15:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6122a28b90e6cf7d45af81f71d67169a SHA-1: 26aeb592d176388f0b643570f17acbda90229298 SHA-256: b17bc8e7f4091c871643e1ee986bae5e4bd5f1ad0c5f3edee599840c7ba2cfe6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and other PDF files, all related to game hacks and free items, indicating a lure for users to download potentially malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of known malicious infrastructure. While no scripts were explicitly extracted, the document body and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-free-clothes-hack-2021-game-hack In PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/all-free-roblox-catalog-items_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/roblox-free-pets_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/how-to-hack-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/roblox-trolling_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/earn-robux-now_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_003_off00004e1a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E1A 25436 bytes
SHA-256: 278d0f0d0b78812fea13f544bdbc40690acd5606bdf7480b9eff99115bfb6288
font_01_sfnt_off000087a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A9 4660 bytes
SHA-256: b8980cdac4d025496d9fe039d8c05bb5b9bae1b804244a1f9c05e9663db72816
font_02_sfnt_off000097ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97BA 19020 bytes
SHA-256: 0839d307a2b2b0084db944de40bfeefdd521184ec5aa7cf38a78bdcc4091b31c

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