Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6d3e00e5c7a8b0…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 22:51:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 973d116269daec26b3f02bc0e454b1b9 SHA-1: 5389f2c0cbdb8208130453781b82d1600b41a55c SHA-256: fc6d3e00e5c7a8b0b74b1f0642e5dbf07b71da7ce91820e8c742867288ebcd6a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free spins promo code for Coin Master game hack" and includes a call-to-action button. It also embeds external URIs pointing to potentially malicious content, suggesting it's part of a phishing or scam campaign. No scripts were extracted, but the presence of embedded URIs and the ML classifier's high confidence indicate a suspicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/free-spins-promo-code-for-coin-master-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/pubg-uc-discount_GM1330123889.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000501f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x501F 24692 bytes
SHA-256: 4c1efd90704e4239dba1392ca351b291727bb07b07eb6524f42cd4078f2994dc
font_01_sfnt_off000088ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AE 3620 bytes
SHA-256: 1c6123b53d0b008bd76d56881717711c1a532303bb0233d9ea7cfdf27c93cf26
font_02_sfnt_off00009572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9572 18476 bytes
SHA-256: 012804114e8e9e2aa3b79000d66a92024558acae5133cb67a1122bc204fa5aec

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