Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4663eb30475a20a…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 06:25:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a07b5565ae2325c5fc349a9c8c323ea9 SHA-1: 54bc8cfda9ac31c00dfd6974f06ad81b26c61b36 SHA-256: d4663eb30475a20a22ec3713384d09e5326eb55bf3ad09a01d7257c2b8f18081
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, including one that masquerades as a 'free generator / game hack'. The document body and embedded links suggest a lure for users seeking in-game items or cheats. While no scripts were directly extracted, the PDF structure and embedded links indicate a phishing or redirection attempt, likely leading to further malware download or credential harvesting.

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-followers-instantly-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hacks-para-juegos-de-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/is-roblox-free-on-ipad_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-codes-2021-august_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-secret-skin-tone-combination_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-hero-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-clothes-catalog_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-lua-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hack-for-wls3_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-clothes-on-roblox-easy_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/best-free-lumber-tycoon-2-roblox-injectors_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000349b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x349B 22292 bytes
SHA-256: 76c29632e42e2c47ff984c398d65ff27beed11ee2687f69c62dd1b1dbd880dc9
font_01_sfnt_off0000664f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664F 18392 bytes
SHA-256: 2a755dc4b6bc4a838b453748260a0d0dc1090d21b5cdc98b17e57c234e0ee06a

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