Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e3a494e26515ae…

MALICIOUS

PDF

48.2 KB Created: 2021-06-11 12:04:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3650ca0fbeeafc512bcc748554e75369 SHA-1: eba5fcb76f0b6a92a416d5432d0722b46a4d37c3 SHA-256: 83e3a494e26515aeca590a400dbe7f43b11bd487a4575267035a0e3f0256b2d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising game hacks and generators. The primary redirect URL is https://netcdn.tw/app/431946152/roblox-legends-of-speed-race-cheats-game-hack, which is designed to lure users into clicking through to potentially harmful content. 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.tw/app/431946152/roblox-legends-of-speed-race-cheats-game-hack In PDF document text
    • https://schulzpressetext.de/images/robux-premium_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://schulzpressetext.de/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/tiktok-free-view-iphone-5c_GM835599320.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-get-a-free-roblox-necklace_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/https-oprewards-com-roblox_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005427.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5427 24868 bytes
SHA-256: dedd219c90d15eb860d9fa10175d8938717a3733180e82768c78289cdf5e34d2
font_01_sfnt_off00008dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC0 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9771 18920 bytes
SHA-256: bc2fbf5c0e461afdce35875c5c88c06cfeda18e7e205cf4fd3b6a1651c411504

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