Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d60589704aca04…

MALICIOUS

PDF

45.5 KB Created: 2021-06-07 12:42:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 537ebccae43b337a1378ede141d87315 SHA-1: d6be891603a8a93fdbf1f35d1ac6f88a5f79d3c4 SHA-256: b1d60589704aca041b8d249cd50b4f155c9fb70e6b256dfd1947fb170acb816a
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary link, https://netcdn.tw/app/431946152/dodgeball-roblox-hack-game-hack, is a critical finding. The document body, though heavily obfuscated, contains references to this URL and appears to be part of a lure to trick users into clicking the malicious link, likely leading to further malware downloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/dodgeball-roblox-hack-game-hack In PDF document text
    • http://feuerwehr-rheinau.de/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-generator-2021-hack_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/hack-coin-master-no-verification_GM406889139.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_004_off00005204.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5204 25460 bytes
SHA-256: 5688297dd3e108bbbbf6da67bd896f7fd7409425145bd34175a684b6cbf5dbd1
font_01_sfnt_off00008d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5B 18812 bytes
SHA-256: 1f7c63aebb28d86a91e09e551d876bd82b2bb4356766d657844e20f33dfafe5b

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