Malicious PDF — malware analysis report

Static analysis result for SHA-256 83206c9fb3c32571…

MALICIOUS

PDF

44.7 KB Created: 2021-06-09 12:18:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7386b68b4e80bb4189fe7156a3725a0c SHA-1: 09603eeee87fe721d72af85d2e421bc937ed5ba2 SHA-256: 83206c9fb3c325715dc9ce5a4cf29d9c888193fbbb6c2bdd4ae677ef92bb4c03
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'cheat engines'. The presence of these lures, combined with the ML classifier flagging the document as malicious, strongly suggests an attempt to trick users into downloading potentially harmful files. The document body, though partially corrupted, contains URLs that are consistent with this phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/roblox-retail-tycoon-cheat-engine-download-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-for-kids-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-pet-dog-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.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_004_off00004f72.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F72 24900 bytes
SHA-256: a8b81e4e04e679b182988821fdfeacb8a1d49aa77db443969155274d17b6584e
font_01_sfnt_off000088b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B7 19376 bytes
SHA-256: 94340c54f6519bb5ddd772c7e471b77528e6fbf588f446ab4f2683e22b6a2168

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