Malicious PDF — malware analysis report

Static analysis result for SHA-256 b612e50a5bee6be3…

MALICIOUS

PDF

32.9 KB Created: 2021-07-06 08:33:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 98273bac8857c4b0ba6a10431b9586fd SHA-1: 559fe158f55034ee35ae8c276b9be532245c89e2 SHA-256: b612e50a5bee6be376545256dbbf6e3cf8cda25fdbe460aad6023a7280462a12
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to 'netcdn.tw' which is flagged as a malicious redirector. The document body and heuristics indicate a lure for game hacks and generators, aiming to trick users into visiting this malicious URL. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/479516143/how-to-get-minecraft-for-free-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-hacks-real_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-hack-gratis_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-lego-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-pastebin-com_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/tiktok-free-mockup_GM835599320.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/pubg-uc-20210_GM1330123889.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/fort-wars-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-mad-games-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hacks-of-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/play-roblox-for-free-on-google_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_off00002dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC1 22336 bytes
SHA-256: 18f5b2e5b95f43f11b7f556e25c65f2068d9e3ff27a180e6300db8a7334f6181
font_01_sfnt_off00005e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5F 18164 bytes
SHA-256: 38b14255ac27b6861525ff1bdc726797405021bf36bbc514593b3ffe59b08c64

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