Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a75fd4db5d3c13…

MALICIOUS

PDF

35.4 KB Created: 2021-06-26 22:52:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9579a899d5df86d4682bbec156c4cb72 SHA-1: 107267c0805ac4be87e228c4cb596daed6151fdc SHA-256: 51a75fd4db5d3c139d85f578a6b9156a81382ed86467073ccb1f549d2b45b151
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure and other PDF files, masquerading as game hacks and generators. The primary lure appears to be related to Roblox and Coin Master, aiming to trick users into downloading further malicious content. No scripts were extracted from this sample, but the embedded URLs and heuristic firings strongly indicate a phishing or social engineering attack.

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/roblox-yammy-xox-hacking-game-hack In PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/how-to-hack-prison-life-20-roblox_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/robux-hack-no-survey-mobile_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/how-to-get-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/pubg-uc-in-cheap-price_GM1330123889.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/aim-hack-roblox-prison-royal_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/roblox-free-download-apk-uptodown_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/is-it-possible-to-get-banned-for-cheating-roblox_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/roblox-cheats-for-operation-squoprion_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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
font_00_sfnt_off000031c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C4 22500 bytes
SHA-256: c49c8990092a5c658e57cae3f463758c31eb7d06a8d1d2261f97d50e263318eb
font_01_sfnt_off00006453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6453 19380 bytes
SHA-256: a862a615c35b28e3f672db2feb6777bca5a22ee03af5f9dcace038562a9a3268

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