Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef332a04df4c943a…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 09:49:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fe9feb492f5bc964936cfaf83b354606 SHA-1: ee26691cd39e4f0e41e67737c9fc3b5e7850eb95 SHA-256: ef332a04df4c943a9cc3542ee8c2d7799c8f8386f2a9f8d5c965b6f95f7d7aa7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to potentially malicious sites, disguised as generators for in-game currency or hacks for popular games. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting these sites, likely for further malware delivery or credential harvesting. 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.co/app/431946152/roblox-hack-menu-apk-game-hack In PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-headset-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-get-free-robux-iphone-5_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-bux-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/woman-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/pet-ranch-simulator-roblox-hach-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-robux-group-payouts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-get-free-robux-not-clickbait-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/800-robux-free-gamekit_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-free-redeem-card_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-robux-no-human-verification-and-no-offers_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_off00003032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3032 22372 bytes
SHA-256: a8312b023d5fcd3df79087d953176af29d534e1c8969ae4748121b539f63ff53
font_01_sfnt_off000061fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FA 19168 bytes
SHA-256: b8f54fbefb34c1297b7e4307dc6126d618213a128795ba0ed12d931d759f0ec2

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