Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec92e2c11f3742c…

MALICIOUS

PDF

35.7 KB Created: 2021-07-09 03:28:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2a56c30ded64997f352550f09447696e SHA-1: 4eeb57264c3364b00fe4fefeb94907c6402d42d9 SHA-256: fec92e2c11f3742ccf214f7baaf5dff313a7988c12ed002a71a77f4afb877a86
160 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free generators, specifically mentioning 'Coin Master' and 'Robux'. It contains multiple embedded links that redirect to known malicious infrastructure, indicating a phishing or scam attempt. The ML classifier also flagged this PDF with high confidence, supporting the malicious verdict.

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/406889139/coin-master-free-spin-and-coins-links-2021-game-hack In PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/is-nexusus-roblox-hack_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/get-free-robux-only-today_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-roblox-codes-gift-card_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox-create-avatar-free_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox-free-ninja-animation-pack_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-legeal-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox-robux-hack-generator-how-to-get-free-robux-download_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-free-quirks-in-boku-no-roblox_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-hack-a-pin-code-in-roblox_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/hack-portal-heroes-roblox_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-hack-into-roblox-accounts-using-a-cookie-editor_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_002_off0000337a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x337A 22808 bytes
SHA-256: c46c69e093ae8a06c82bb965f8220cf404b1c0ac7bb4d37f19558a29b8294e1d
font_01_sfnt_off000066cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CB 18920 bytes
SHA-256: 6400190eeb2151d5e1f5614a198f46375c96aba5f11acfeaff13e592fb093653

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