Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f00e964d44c08ac…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 00:30:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: deea397c8c314cd092a24ac3d5b405ab SHA-1: 35049c12b70553b35dbdbfe2505dffbad52cc76d SHA-256: 4f00e964d44c08ac3ac46784dcb210a3fc560850bef6b8b15679bcf5c567d199
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary link identified, http://netcdn.tw/app/406889139/free-coins-coin-master-iphone-game-hack, is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack designed to lead users to potentially harmful content or further malware downloads.

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/free-coins-coin-master-iphone-game-hack In PDF document text
    • http://library.patria-artha.ac.id/repository/yotube-hacker-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/pokemon-go-free-download-android_GM1094591345.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-generator-2021-working_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-blood-moon-tycoon-auto-rebirth-hack_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-group-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-cheat-engine-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-shirt-adidas-free_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/pastebin-roblox-free-obc_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/robux-come_GM431946152.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
font_00_sfnt_off000030ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30ED 22372 bytes
SHA-256: 4dd7f2548f97c765b52f39d46e83875452ec3526c7f073cf5f25646e0f08ebb9
font_01_sfnt_off00006287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6287 18340 bytes
SHA-256: 30781d46c9e61b7b1a0f84e620c871c295e19140ef15a20a5b93ccdb3b5c2c15

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