Malicious PDF — malware analysis report

Static analysis result for SHA-256 83788bc4c1847c41…

MALICIOUS

PDF

24.6 KB Created: 2021-06-28 12:27:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 90bcba22437b7424a8b64063a25d83fe SHA-1: 8401ce4ff688b913e3f9bd448230e7d28ec92ca9 SHA-256: 83788bc4c1847c41f18638ee276200158d1045d4b31b4cb3819ea7d05b65fac7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link that redirects to a malicious URL, identified by heuristics as a lure for game hacks. The document body and embedded URLs reinforce this theme, suggesting a phishing or scam attempt to trick users into visiting potentially harmful sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 3

  • 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.
  • 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.co/app/431946152/hack-de-robux-100-real-no-fake-game-hack In PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hacking-citizen_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/114-4-hacks_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-free-hair-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hack-be-other-players_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-can-you-upload-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/hack-adminisrtateur-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/get-a-castle-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0A 22536 bytes
SHA-256: aad3992de8eeaa6d5a7a79181990e9c5d7bb0b2c940027c379b56c94304500a9

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