Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a912d8848f6c314…

MALICIOUS

PDF

49.7 KB Created: 2021-06-08 02:19:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bd527cb81a4c4b50877e677a5d5bf671 SHA-1: d4d404b772ca3e85dac8c6e46706002358003bea SHA-256: 4a912d8848f6c31455e5a45a85255cc98df44314cd919c2e7e20dddb798bb714
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, specifically advertising 'free Robux' and 'game hacks'. The document body and extracted URLs reinforce this lure, aiming to trick users into visiting potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/free-robux-rbxrewards-game-hack In PDF document text
    • http://internetdeputy.com/images/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://internetdeputy.com/images/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://internetdeputy.com/images/robux-download_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/how-to-get-free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/robux-game_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://internetdeputy.com/images/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://internetdeputy.com/images/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/free-video-files-for-roblox_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/tiktok-fans-for-free_GM835599320.pdfIn PDF document text
    • http://internetdeputy.com/images/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://internetdeputy.com/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/roblox-free-rubux-sans-email_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000506b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x506B 29612 bytes
SHA-256: 9af2d9425be6c2dd7be5e1ae0301722bb4606b97a97303d87ce4e1e13b963cab
font_01_sfnt_off00009460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9460 2956 bytes
SHA-256: bab8933fc39dc331bc4c1c904a82b1432ab2e02478fa0a59453c98c5c231da8d
font_02_sfnt_off00009e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E80 18580 bytes
SHA-256: f6e5d240c50f73aa936fa09c98082d3b637660329d811c3f0d463ac63f7ff7de

Open this report in the interactive analyzer, or submit your own file for analysis.