Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d3ebd9b3fda3bc…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 09:45:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f64052f3db778754573c88849e2bb4f7 SHA-1: 6821d809fbb5065c28ec9011218560550e2378ca SHA-256: b1d3ebd9b3fda3bc00ce7b6bb00b84b71941f32e3ce2f3f003e3d27cf5dacbd0
160 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The embedded URL, 'https://netcdn.online/app/479516143/minecraft-free-download-pc-game-hack', is identified as a known malicious redirector. The document's purpose appears to be tricking users into visiting this malicious site under the guise of free game content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/479516143/minecraft-free-download-pc-game-hack In PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/tiktok-free-play-online_GM835599320.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/roblox-verification_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-robux-net_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/roblox-apocalypse-rising-hack_GM431946152.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_off000050d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D4 25140 bytes
SHA-256: 9080a54d19ea37ef5a5faf6f98dd5d7beb0ee7831a68c6ada8d6fc15be1ae833
font_01_sfnt_off00008a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A02 18444 bytes
SHA-256: 064b6ae6fa3971595f13ccf6914158de219c664ec1a7cfca763d46b46d8283c4