Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83d45ba2282383d…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 10:38:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d5f566a6398b6daaa28595e01eca5803 SHA-1: 7362e639e03700df3021502ac4a9e2d47e96375a SHA-256: a83d45ba2282383de6eacf35c5ad178221bcab24a6479ef84a1d0d915c01f5c3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, masquerading as a generator for free game items. The document body and heuristics indicate a lure for free game currency or hacks, which is a common social engineering tactic. No scripts were extracted, but the presence of malicious redirector links and the lure strongly suggest the intent is to lead the user to a malicious site for further exploitation or credential harvesting.

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/479516143/free-minecraft-premium-account-game-hack In PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/50-robux-free-codes_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-how-to-get-anything-off-the-catalog-for-free_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-get-free-robux-july-2021_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-hack-pc-download_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-prison-life-hacks-2021_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/freerobuxcodegenerator-roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/wwwbandicamcom-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/complete-the-obby-for-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-executor-download-free_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_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_off00003004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3004 22480 bytes
SHA-256: 0ed8a74773b0470bb754301100a0bc5348f9ac19831f117fe46ab43f959b5fa2
font_01_sfnt_off00006175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6175 18552 bytes
SHA-256: 335ad5bd11d1b5490beeffd4b04e426b92c3c8588cbb26eb3dbcf918d515cd86

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