Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26a86b59ffb5b51…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 17:24:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fffbfc8d4da6be657948ed9fdfeb2c85 SHA-1: 68992d965ec040d703387d4a5f5950ecfa09c4f9 SHA-256: b26a86b59ffb5b514a6be43ec1935e7195431a3c363f6bb8e65daf738b012894
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/835599320/get-follower-tiktok-free-game-hack, which is presented as a lure for free game hacks or in-game currency. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of malicious links and the lure 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/835599320/get-follower-tiktok-free-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/rocitizens-infinite-money-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/abd-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/counter-blox-roblox-offensive-wall-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-hack-download-iphone_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/noob-vs-pro-vs-hacker-vs-god-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hacker-destroza-la-ciudad-roblox-pokemon-gomiannn_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_off000031e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E9 22680 bytes
SHA-256: a5f4a9b5be24a40be4550e1a64765d8eb438d2e5909b4d6aaede9f2ee437ef35
font_01_sfnt_off000064c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C9 18208 bytes
SHA-256: de057684b1464e7e9f5ff33d25cdfeeb3432e75c33c651fae0dad7fd0726da70

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