Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4284ac281382bb…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 11:03:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5e45caab0f5d535ea9a2bddf1d9784e4 SHA-1: 5690bfe1688524f9e5acb7a9d2bce70a9a4999ff SHA-256: bb4284ac281382bb264cd55e9b3ad3c6c46d5840c17b0c121149cb0300021645
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase designed to lure users into clicking on a URL that leads to a malicious redirector. This redirector is associated with distributing malware or engaging in phishing scams, likely related to game hacks or virtual currency. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

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/431946152/complete-offers-for-robux-game-hack In PDF document text
    • https://topkoreamart.com/public/upload/files/roblox-free-rbx-2021-june-hack-no-generator_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-robux-hack-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/roblox-forsaken-sword-3-hack_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/www-roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/roblox-create-texture-hack_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/mistplay-robux_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-admin-hack-roblox-kazok-the-youtuber_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/roblox-comment-hacker_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/can-i-have-robux_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/how-to-hack-bytecoin-mining-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000309c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309C 22140 bytes
SHA-256: 5db4665ff5c06c3966641476cf4f938c26443ca326e2beff5df3aaa61af8f532
font_01_sfnt_off0000618e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618E 19332 bytes
SHA-256: 4d9ba5d453d99a2070cb758231aeac466e4ae09db5fcec1b276eb87b14b4c5aa

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