Malicious PDF — malware analysis report

Static analysis result for SHA-256 34dfb76f56f4f73f…

MALICIOUS

PDF

32.1 KB Created: 2021-07-05 23:44:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 731a0f0fe1cd3e1a7d9a060f909c5f0b SHA-1: e16329c7afffde0fd1a37cdcad3faf4ce0bf398d SHA-256: 34dfb76f56f4f73f1d74b013856b39297bfda66c396303bc3d74ccba8e278e6c
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a redirector lure, specifically pointing to a 'free generator / game hack' URL. This URL, http://netcdn.tw/app/406889139/free-coin-coin-master-game-hack, is identified as malicious infrastructure. The document body also contains this URL and other links related to game hacks and exploits, reinforcing the lure. The presence of a visual download button further supports the deceptive nature of the document.

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/free-coin-coin-master-game-hack In PDF document text
    • https://www.ocic.hr/files/tiktok-free-hearts-apk_GM835599320.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/free-roblox-accounts-with-robux-2021-november_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/badge-giver-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/how-do-you-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/wurst-112_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/ghouls-bloody-nights-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/command-bar-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/roblox-for-ps4-free_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/hack-team-roblox_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/roblox-free-rixy-accowt-live_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-hacks-wurst_GM479516143.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_off00002aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AEE 22040 bytes
SHA-256: 1d96ff7a7c1003720e6b62d169a2dad650e82410f8512852ebdd435246af83be
font_01_sfnt_off00005b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9A 17996 bytes
SHA-256: e3fb1ca426c01543f38f1d1129ae452bef28a40365fbe99abf1b239340e30419

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