Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac3252b9dd01f98…

MALICIOUS

PDF

45.5 KB Created: 2021-05-14 03:31:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: efe6cd8601b06d7ddbbcd6f058cc80c1 SHA-1: 169be1a85242dd80d6dde06ee2912f8ffbc52c9a SHA-256: dac3252b9dd01f9808aeacdf5197ca7cba804f127494dfae52b407d2721687f5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a direct link to a known malicious redirector infrastructure, disguised as a "free generator / game hack". The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector strongly suggests the document is intended to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/431946152/robux-free-co-game-hack In PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robux-best_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004868.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4868 26356 bytes
SHA-256: c27ae02d8f5aa47d3e5eb27c800d9d5176fd808ee4b25c86c6ee6830b6a3bac1
font_01_sfnt_off00008650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8650 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFF 18012 bytes
SHA-256: 3f1ded8a9c51e4f0f41c660fd84d3573ebe8f92a83837bcaa523a9614d650e73

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