Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4c7476a48316a7…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 08:11:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0d47525bba48b30fcce5f914d36f96fc SHA-1: c8df493754c6db0dcb711947020b4b6a57631333 SHA-256: aa4c7476a48316a7a9488650fda41424aecf2abc8f50f6caf458456d9bb40b90
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, that lure users with promises of game hacks and free currency. The document body and heuristics indicate a redirection workflow designed to lead users to potentially malicious content or downloads. No scripts were extracted, but the embedded URLs and redirector findings strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/hacking-curleyhairs-in-roblox-game-hack In PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn macro / runtime command snippet
    • https://digilib.stimlog.ac.id/repository/hack-de-robux-2021-100-real_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-csgo-free-skins_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-private-roblox-server_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-fire-vs-pubg-tik-tok_GM835599320.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-create-your-own-scripts-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-swords_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cool-roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-for-free-no-robot_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-cheats-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://netcdn.co/app/4319461In macro / runtime command snippet
    • 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_off00002f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3D 21948 bytes
SHA-256: ae49a14ee52e29b99fee692c2dee6844f6e22806425b48c3129f55555fcf974b
font_01_sfnt_off00005fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC4 19264 bytes
SHA-256: 4c89e8d26904343cb3e6e46361e7ed4be514629b2c2115c0ea44765a7a75192d

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