Malicious PDF — malware analysis report

Static analysis result for SHA-256 51bf71ef167b55d6…

MALICIOUS

PDF

45.9 KB Created: 2021-06-13 20:33:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f7e48ff1a0f9cf5b74b24ca8c96c9324 SHA-1: 49df4d473b9dcc6400bfb9e45071119fe847384f SHA-256: 51bf71ef167b55d6e872b4597e402f543917c6117c87bc4c020f40dae54a43f2
160 Risk Score

Malware Insights

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

The PDF contains a lure for free game hacks and generators, directing users to a known malicious redirector infrastructure. The document body and heuristics indicate a social engineering tactic to trick users into clicking the malicious link. No scripts were extracted, but the primary malicious action is the redirection to a potentially harmful site.

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.co/app/431946152/free-roblox-army-template-game-hack In PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/pubg-uc-20219_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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
stream_003_off00004d29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D29 28272 bytes
SHA-256: 2436fef18883a8ff0ed9ad01232113da10c816fc6ea359c4f9255652bb7a3dad
font_01_sfnt_off00008f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6A 18896 bytes
SHA-256: 518aee1ff38accb1726dccf2e85d22566b06d1f700ada769f8bf1d6105fa7cc7

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