Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab4c29a78c3f328f…

MALICIOUS

PDF

35.3 KB Created: 2021-06-29 05:53:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 76758d3ff12450c81b49f1847166dc1b SHA-1: c35ac7d4a299427725d6de3fbdb627ae25d37898 SHA-256: ab4c29a78c3f328f0bc4bbcc3a2cbffbac4680f88302f34c9350281b354fa543
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including a critical one pointing to a malicious redirector infrastructure associated with 'free generator / game hack' lures. The document body, though partially corrupted, also contains references to 'free codes for Roblox' and a primary malicious URL. This suggests the document is designed to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

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/how-to-get-free-codes-for-roblox-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-change-your-roblox-username-for-free-on-ipad_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-game-advertising_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hack-on-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/instaler-un-cheat-pour-roblox-phamtom-forces_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-fan-clubs_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hacker-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-to-roblox-card_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hackear-tarjeta-virtual-para-roblox_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-speed-hack-in-any-roblox-game_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hacker-2021-download-free_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-unused-roblox-game-cards_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/project-delta-roblox-cheats_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_off00003234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3234 22684 bytes
SHA-256: 8478f81099fcca271a59c634f44ffbbc423cd7428367d0d1096e6cddb2222503
font_01_sfnt_off000064df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DF 19092 bytes
SHA-256: 8f4b9898508b2d7c722b834b7ff830c48b4536b9ed8660fd89546aef8b21d5f5

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