Malicious PDF — malware analysis report

Static analysis result for SHA-256 191fc89b2dee288a…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 14:10:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f872b4fcfe5d618e8425faa2b5da4244 SHA-1: 30f6bdf170fbe233d7a645541a6fd4988fe9da65 SHA-256: 191fc89b2dee288ae3ebc7e99bbff886896711d7ac60b25d64ecf1a016a57857
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, one of which, http://netcdn.tw/app/835599320/free-likes-and-followers-on-tiktok-game-hack, is identified as a malicious redirector. The document body also contains this URL, suggesting a lure for game hacks or generators. The ML classifier also flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be a phishing lure leading to malicious infrastructure.

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/free-likes-and-followers-on-tiktok-game-hack In PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/hacks-exploting-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/free-800-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/roblox-e-free-command_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/hack-someone-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pacitan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-no-download_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_off00003223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3223 22320 bytes
SHA-256: 633115d0ad1cdd12e5d6ccc3bbbb2490276c25d442af5f455a766f02bc3e75fc
font_01_sfnt_off000063d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D7 18384 bytes
SHA-256: 7680189fc1291fc2c995a85ecea8d17d2b585cc9b37a99129ba6b11181c6b936

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