Malicious PDF — malware analysis report

Static analysis result for SHA-256 876bfeb4b0e14a21…

MALICIOUS

PDF

46.4 KB Created: 2021-06-07 00:55:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4fc8b8f97c6076f78023ef1499dc4603 SHA-1: 09a649ae3b2a211cb95dbe93eb48ed5616e93d21 SHA-256: 876bfeb4b0e14a21effb40de5a56e9d83e5f8a0a0d307181b48a489a78ea26f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary malicious URL identified is https://netcdn.tw/app/431946152/roblox-black-panther-shirt-free-game-hack. The document body and heuristics indicate a social engineering tactic to trick users into visiting these sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-black-panther-shirt-free-game-hack In PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-gucci-shirt-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/daily-free-spins-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_off00005349.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5349 27768 bytes
SHA-256: 99d03a3ea02fe8f6ec9c0906baa87b9ea4a7f0a3f5f0e65e0c7f53a6ecdc8147
font_01_sfnt_off00009182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9182 18888 bytes
SHA-256: 269cdcc1db58ebb6b102c6211089567ae4595af7d955bfcaebd327453458b3d7

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