Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91474dd81900bd1…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 02:40:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3756b0e0a79c4abdc4633cd3e6ed973d SHA-1: 25709532d6cc6890660d49472681e6ff15024f0c SHA-256: c91474dd81900bd166d9b965f61f50fecaa7bdd853840ae4c938d50ffc496974
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/marshmello-shirt-roblox-free-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/bloxgiving-roblox-high-school-cheat-sheet_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-bir_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-kick-off-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/speed-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/wie-kann-man-bei-roblox-geld-cheaten_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-org_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-realms-free_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 22524 bytes
SHA-256: 947e8efe09e6df742638e07d929c5ab052437fde33700e6bfcac0b4ff0e533ec
font_01_sfnt_off000063e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E2 19496 bytes
SHA-256: 0455938f8ba5f2001ffd012d13a69db885e881ad0565f9f4603d11110e989641

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