Malicious PDF — malware analysis report

Static analysis result for SHA-256 a078541b77e182b0…

MALICIOUS

PDF

36.1 KB Created: 2021-06-25 21:50:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c632bc2c9bc3f4cbab550b4139073537 SHA-1: d209b4a8a30b8f78a5c7a31bc5e0996525c3b97f SHA-256: a078541b77e182b0ab0d0358e8f849ecf3e304765500d3af9dcb22cb3516f168
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.co/app/431946152/robux-hack-no-verification-or-survey-2021-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/how-to-get-free-vip-in-roblox-fe2_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-robux-in-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/blue-pants-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-robux-hack-without-human-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-stuff-dungeon-quest-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-a-free-boombox-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-jailbreak-beta-cheats_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-collect-free-liverpool-scarf_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • 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_off000032bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32BC 22668 bytes
SHA-256: a6b4668bd3ec4f47771ea1f3b36a2e6960d297cabbc625811e32b235f428c1a6
font_01_sfnt_off00006588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6588 19776 bytes
SHA-256: 2cb1211f6cae3be6c636582e9a40dfb8bb66df599620c49c308a474d9a86a801

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