Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f28d3f42ad1060…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 09:28:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a3d0aa5e2cfd4a66bf440e2b6a03ff71 SHA-1: 6a3dde71ad8a20764d2dda0874fdce23b77dcf6d SHA-256: f0f28d3f42ad1060a277a64f714ead53b4ea117c1f2b51ead973b4758118009b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to a known malicious redirector, specifically advertising 'free generator / game hack' content. The document body and embedded URLs reinforce this lure, directing users to a URL that likely leads to further malicious content or malware download. No scripts were extracted, but the PDF structure itself facilitates the malicious 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.tw/app/406889139/totally-free-coin-master-spins-2021-game-hack In PDF document text
    • http://perpus.stfm.ac.id/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/player-esp-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000323c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323C 22996 bytes
SHA-256: 59851a523bb982002ec16801022aec06dc5f5d6f10cdfa800f1471f49f0a72c4
font_01_sfnt_off000065d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 18828 bytes
SHA-256: 5adfd421e4db1fe589a879acc21a0ccd6a3268d3686011c040bf88d8a6c0e8a1

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