Malicious PDF — malware analysis report

Static analysis result for SHA-256 295fc9b9903963d2…

MALICIOUS

PDF

33.5 KB Created: 2021-06-19 23:51:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 085bc487e6763d66de564cf00b653b9f SHA-1: 985b3de8b5fcd4177ec83098470db3f5f7001bf0 SHA-256: 295fc9b9903963d22f842089557dee8d21c8ceb93d67ddd2a947a19e2697b882
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games like Roblox. The ML classifier and critical heuristics strongly indicate malicious intent, likely to lead users to a phishing or malware download site. While no scripts were directly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to exploit user interest in free in-game items to compromise their systems.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.co/app/431946152/xbox-roblox-free-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-promo-codes-2021-august_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hacks-robux-gratis-rapidos_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-counter-blox-skin-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-2021-pc_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-shirt-bot-discord_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hack-roblox-with-cmd_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-without-survey_GM431946152.pdfIn macro / runtime command snippet
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/cheat-roblox-mod-de-passe_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/reposIn macro / runtime command snippet
    • 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_off00002f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5F 21620 bytes
SHA-256: 80627b29427c8fdacf4160271a718f53f8575c928e77ad4c7cbb715016b82350
font_01_sfnt_off00005ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED4 18652 bytes
SHA-256: 79b021ccf94928575670518220be9efb0216090ad75aa976803fc94ec913f865

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