Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a3d564b8dc3329…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 22:24:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f4ea43c701bff8308eca054bcf025237 SHA-1: 2740a67d8e94f0c06dc0ef27e3ab77fa8062450b SHA-256: 16a3d564b8dc332979742eb0430076db390548ff694c9c4060a4b407e5f8aa90
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to known malicious infrastructure. The document body and embedded URLs reinforce this, presenting a deceptive offer to entice users to click the malicious link. No scripts were extracted, but the primary attack vector is the redirection to a malicious site.

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-whatsapp-tik-tok-status-download-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-oof-sound-copyright-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/simple-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-high-school-how-to-get-free-gear_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EB 22040 bytes
SHA-256: 3836d9dcd372a8ef7d0e8fdc7dbf598c585ffc8152095c83f0960beec92af63e
font_01_sfnt_off000062cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CC 19232 bytes
SHA-256: f3de6a31a9c2b03e7e71233a7f8a569ddf8d44aea4789253b6f0529d58a96389

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