Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c75b4fd79ed1f0…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 07:46:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4723f4f97e5f60e8e6b96f41990422d9 SHA-1: 8908441a8c83629473c08a38f44a36022a66fb37 SHA-256: c7c75b4fd79ed1f015ed5b4ab7bd9f7effd38725be5088e20e8e7d3e39760b56
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack.

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/coin-master-hack-game-download-mod-apk-game-hack In PDF document text
    • http://library.unissula.ac.id/fe/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/pubg-uc-egypt_GM1330123889.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/miss-play-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-hacks-no-down-load_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-how-to-get-free-robux-no-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/get-free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-a-free-seerin-roblox-mm2_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/descargar-roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-generator-no-surveys-and-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hacker-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/youtube-roblox-free-builders-club_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-free-ios-no-verification_GM479516143.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
stream_002_off000033bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33BF 22944 bytes
SHA-256: f1fc43bfbd39ddac45dfc753216a533b6cd82e2995bb28296149a2a8f24acd43
font_01_sfnt_off00006744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6744 19020 bytes
SHA-256: 080ee611911e619ec037778181e8e4f02b81aebe4c14f655b423bcceea9af457

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