Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8a598f5a93bfa8…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 20:47:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 08d558c5cc4e34f7213bdf042a535d6d SHA-1: 1f0c2ede4196a142c1106920fef25a8f23540eca SHA-256: 9f8a598f5a93bfa831fc50b3311cc6541ff49923f3f231d9806af8a0f65852d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game currency and hacks, directing users to a known malicious redirector. The document's content and embedded URLs strongly suggest a social engineering tactic to lead victims to potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the 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.co/app/431946152/do-u-get-free-robux-in-roblox-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-without-having-to-download-an-app_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/wahoo-gaming-co-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/gengreating-free-roblox-redeeem-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-gamepass-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-denisdaily-roblox-account_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cone-master_GM406889139.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_off000030eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EB 22384 bytes
SHA-256: 4764bce7e5066d7d97590ca1a4e10f4f7239cc7d241de7ee0d9766b83ce4fe10
font_01_sfnt_off000062e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E1 19060 bytes
SHA-256: 718ae88a376acb66470554e306478cbf38ef18c2f04ab4c5ee5db7861bd7bfc5

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