Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2b4e55f8534e45…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 17:40:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a6d2f60834692fc53b92229ce2a85334 SHA-1: 6801e4fb805b81303ed8967dd858fbd5cbd6f6ed SHA-256: 3f2b4e55f8534e450d7ec7372d90edb3a6b0dd8ba964a181aa19d4349fabc567
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a malicious domain, masquerading as a 'free generator' or 'game hack'. The document body explicitly mentions 'Free Tiktok Fans' and 'game hack', reinforcing the lure. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt designed to lead users to malicious infrastructure.

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/835599320/free-tiktok-fans-no-human-verification-or-downloading-apps-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/muscle-roblox-manequin-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-mm2-coin-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/counter-blox-roblox-offensive-hacks-2021-how-to-get-money_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/kazok-roblox-account-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-welcome-to-farm-town-beta-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-install-hacks-for-roblox_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_off00002f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9A 21824 bytes
SHA-256: c93d7b711d211468c691a7619d6be512f50a8c77fbe71c8265a488aa48dafade
font_01_sfnt_off0000600e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600E 19260 bytes
SHA-256: c23abd5df90a5b7093cc3e198b5bcaea5ee7ff11a274e14c679da15d1a345c21

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