Malicious PDF — malware analysis report

Static analysis result for SHA-256 71a34bc50e6bc1ad…

MALICIOUS

PDF

33.5 KB Created: 2021-07-04 10:22:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 55d56874ba6e2723bcf6908c5b926a8f SHA-1: d61a9d9292995fc1ebf7e49036f547dd1c23e51b SHA-256: 71a34bc50e6bc1ad5c9c3633bd0e6c474ea376c5573855719bf4dfdb55f7578a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, masquerading as a 'free generator / game hack' for Minecraft. This lure, combined with the ML classifier's high confidence, indicates a phishing or scam attempt designed to redirect users to potentially harmful sites. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a malicious intent to lead users to malicious content.

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/479516143/minecraft-116-free-game-hack In PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/what-is-the-money-cheat-for-roblox_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/hacks-para-roblox-2021-octubre_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/roblox-build-to-survive-the-zombies-cheats_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/roblox-legends-of-speed-hack_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/how-to-get-robux-on-roblox-hack-no-offer_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/roblox-loop-jump-hack_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/how-to-get-a-roblox-mad-city-money-hack_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/coin-master-free-mighty-lion-card_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
font_00_sfnt_off00002f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5A 22276 bytes
SHA-256: 57796fc6770d61ec2479f4570b1b3b31592e4af4b695afbda83cbd416da07f63
font_01_sfnt_off000060de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DE 18132 bytes
SHA-256: b2108519a49c60d844da2629d098a57ee686039b5b96c7053660c600cced3d73

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