Malicious PDF — malware analysis report

Static analysis result for SHA-256 958d92897559ab84…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 23:41:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e8a19890616a4a90f64ebe189664546e SHA-1: 37161a54a36ff5e07260711ef1fb9b7c3dc4439a SHA-256: 958d92897559ab84298a1be0e37d134757a1139d833e5908f5eeadca5b02ae77
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one to 'netcdn.tw', which is identified as a malicious redirector. The document body and heuristics suggest a lure for game-related cheats or generators, likely intended to lead users to malicious sites or download further malware. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/479516143/minecraft-free-online-game-hack In PDF document text
    • https://www.tdbaska.hr/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/pet-ranch-simulator-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coins-master_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://www.tdbaska.hr/files/roblox-social-link-cheat_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/how-to-hack-teleport-a-player-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-robux-id_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/nocliping-hack-for-prison-life-roblox_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-to-hack-roblox-account-password_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/robux-club-roblox-online-hack_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/como-ser-un-hacker-profesional-en-roblox_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/roblox-free-weapons_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CF 22312 bytes
SHA-256: 7428f9755e1a3d543ac48ab2f2a1a3353e2e306445b13b7a48e9cdd66f061ac6
font_01_sfnt_off00006335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6335 17928 bytes
SHA-256: aabc457c6fa2ff1a57cb7517c3773770131e5bb15a40066da2bb934e749c82de

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