Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a8764a11ea199e…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 09:51:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7adfa748923a5b53812033e44831ff9f SHA-1: a85cf217686c97fd7520a09913c7ab4b8248d8d1 SHA-256: 44a8764a11ea199ee35914540cd81bee17bcbfb11906d838a270cf495000ffc3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically advertising a 'free generator / game hack'. The primary malicious URL identified is http://netcdn.tw/app/406889139/free-coins-coin-master-link-game-hack. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful content.

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-link-game-hack In PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/how-to-get-free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/roblox-full-hack_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/robloxs-download-free_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/hilton-hotels-hack-roblox-vermilion_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/how-to-hack-super-jump-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/hacking-commands-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/can-you-hack-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/free-robux-no-survey-and-humanvertifcation_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/is-it-cheating-to-use-a-autoclicker-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/free-roblox-download-for-chromebook_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/infinite-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/roblox-hack-no-human-verification-2021-pc_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
stream_002_off0000323c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x323C 22960 bytes
SHA-256: 94a05fc73054d14e2d4481ef02b28bc4db6366ff2338a1630fd0b08b4dfd6293
font_01_sfnt_off000065e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E3 18168 bytes
SHA-256: b0fd03f2280421e1c8ba538a35ec3a9afcfe64ddb22ef6ef66156561f264a38b

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