Malicious PDF — malware analysis report

Static analysis result for SHA-256 e637aade1c6daaab…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 21:23:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8b39df007cb713e685ead570d7ce557e SHA-1: 1e8d475e8a846506cfadc8b3dd850c2200bfe5ed SHA-256: e637aade1c6daaab099bb3b73a3c9722544c9ea218088d1d5a9749837a83c78a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a known malicious redirector, leading to lures for game hacks and free currency. The document body and embedded URLs suggest a phishing attempt to trick users into visiting malicious sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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/easy-robux-today-com-game-hack In PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/best-level-7-free-script-injectors-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-robux-hack-no-survey-or-download-u-siad-tags_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-hack-client-2021-download_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-got-hacked-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-200-dollar-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-use-cheat-engine-on-roblox-undetected_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/easy-hacks-of-money-for-rocitizens-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-2021-xtill-working_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/unreal-cheats-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hack-rapidit-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/cheat-code-roblox-superhero-tycoon_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-bazooka_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-stuff-in-roblox-july-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hacks-for-roblox-backpacking-beta_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robloxcom-hack-download_GM431946152.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_off00003128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3128 22736 bytes
SHA-256: e81de8a0362d801c6588e85669f4987d0dd313cae08237b1ae7237f011628905
font_01_sfnt_off000063e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 19168 bytes
SHA-256: 4998178e01b6573bad71b3be76ca6238676106c6934825eb3913c5ce476b07d6

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