Malicious PDF — malware analysis report

Static analysis result for SHA-256 6006068e4c5d6ab1…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 11:52:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 54d371bc036fd3e0c5b7218e053bec03 SHA-1: e447754c04a85b2f7e256add1fb7f8354eb62d70 SHA-256: 6006068e4c5d6ab14de7746157a1ee4550dbbc0c34ffac37458763e47656dabd
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized PDFs related to game hacks and free currency. The primary lure appears to be a 'coin-master-gold-cards-hack-game-hack' URL, suggesting a scam or phishing attempt. The document body and heuristics indicate a lure for game-related cheats, and the presence of many external links points to a link farm or redirection strategy to monetize user clicks or lead them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.online/app/406889139/coin-master-gold-cards-hack-game-hack PDF link annotation
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-games-for-girls-free_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-tiktok-app_GM835599320.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/kick-off-reach-hack-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005215.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5215 25368 bytes
SHA-256: e4fd192bcb5c2be36144c3b32bb8d4804d1528660d52a9abb500be5e8eff7927
font_01_sfnt_off00008ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE0 3560 bytes
SHA-256: 9d03f7c6c62ba3e7fdc0441e9d982a863b2b60b781165d6920512f68ecc4a440
font_02_sfnt_off00009967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9967 17964 bytes
SHA-256: adb4edbf0c57abdeeb225f0bd422abdfe2e9b1ff4eb8b752c2c204cd3e2141b0

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