Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39e2b92fa5bbf60…

MALICIOUS

PDF

36.5 KB Created: 2021-07-05 04:41:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4425aafc2f021c556064d94ef93122f9 SHA-1: 262dbb752d30e124ffd86ecea5524ab3b2f6dc29 SHA-256: c39e2b92fa5bbf6057f27e774006b4909370b662ba155404b615b1748f39b0b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of game hacks and free currency. The primary link, http://netcdn.tw/app/406889139/free-spins-on-coin-master-game-hack, is associated with known malicious redirector infrastructure. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/free-spins-on-coin-master-game-hack In PDF document text
    • http://library.stikessuakainsan.ac.id/repository/get-free-robux-with-synapse_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-code-cards-website_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-meep-city-how-to-get-free-coins_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/comment-hacker-un-server-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-online-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-play-piano-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-hack-roblox-ninja-assassin_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/como-hackear-coin-master-ios_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB9 22528 bytes
SHA-256: 67c7ab1ea6555af59e7f0e37b580747d5494cf95bde047cafd9a7f1c4ed63d22
font_01_sfnt_off0000621b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621B 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C00 18176 bytes
SHA-256: 1d97d559b00188de25375047baff616ad70156a7868f4dca1def947dc1a2c5ee

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