Malicious PDF — malware analysis report

Static analysis result for SHA-256 165723c168435dba…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 12:04:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9e2b6dc52654ca5ee4d2ccc1c618fa25 SHA-1: 4488f2cfc94ddfed395bb55fb9d0e6601169dd07 SHA-256: 165723c168435dba535fa71a3bf6c02a3f81d9aca1601cca49845c61e08c7b30
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 a URL that is also flagged as a malicious redirector. The document body reinforces this by displaying the same malicious URL and related lures for game hacks and currency generators. This indicates a phishing attempt designed to trick users into downloading potentially malicious software.

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/406889139/download-coin-master-apk-hacked-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/2021-robux-proof-for-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-gucci-pants_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/autoclicker-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-gift-event_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-initiate-unlimited-free-robux-40m_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-game-free-download-for-windows-7_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-working-hack-dll-for-ccc_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-printable-roblox-birthday-card_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/auxs-roblox-hack-pack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-cheat-engine-swordburst-online_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-offline-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-generator-download_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-online-hack-2021_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
stream_002_off00002e49.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E49 22704 bytes
SHA-256: 62925eeb8deebaf5887ce6414389c7f227852a09e62d33d77e7169cf33755f23
font_01_sfnt_off0000614b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 18760 bytes
SHA-256: 730ee1d96cda19f7c4a03b449f27cedd631d74d7639b5d8272a7d4c4d2e1f6fc

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