Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a7aca94aaf6da4…

MALICIOUS

PDF

44.7 KB Created: 2021-06-11 04:35:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 66d6705972df25c064a2183f5234e285 SHA-1: 2e48f637e565efbfb2b032d953b21d8a606b567e SHA-256: 36a7aca94aaf6da497cdfa13d3663e5466465c45c72be2beaf2020ab5cc7ea43
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The heuristic firings indicate that the document is designed as a lure to trick users into visiting these malicious URLs. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/admin-hack-download-roblox-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-get-free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-promo-codes-2021-may_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/dessert-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-roblox-games-with-cheat-engine-62_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/ninja-legends-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/theme-park-tycoon-2-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-how-to-february-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-flood-escape-to-how-to-get-fly-hacks_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/get-free-robux-now_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
stream_004_off000051f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F4 24520 bytes
SHA-256: 3602197e7a1803e503074acc0e5c0964a3a1ad4853191b38d3bb285c004be700
font_01_sfnt_off000089d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D3 19068 bytes
SHA-256: ecf8808950d6562aecc7f6eabb2bfbb539a522cb0f7324f489956bb8c09668c6

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