Malicious PDF — malware analysis report

Static analysis result for SHA-256 747d1f431481cbde…

MALICIOUS

PDF

41.4 KB Created: 2021-05-10 16:34:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ca2de97c041b61a302e2852ae4e9d87a SHA-1: 1e635738a3de468d19350362be8607580e88e03a SHA-256: 747d1f431481cbdeb5dcaba82754f2e962fe40a55a9fd745fb2230a93b643b38
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, specifically targeting Coin Master. It also requests recovery secrets, indicating a phishing attempt. The embedded URL leads to a known malicious redirector, likely serving as a lure for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • 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.
  • 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 https://netcdn.xyz/app/406889139/how-to-get-free-spins-and-coins-on-coin-master-game-hack In PDF document text
    • http://library.darmaagung.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/roblox-rape_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/tiktok-minecraft-hacks_GM479516143.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
stream_003_off00004793.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4793 24556 bytes
SHA-256: 95831374e5419f5902fb962176e477bc520eaaf8d0032f2af6107a6a5be07367
font_01_sfnt_off00007f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9C 18224 bytes
SHA-256: c3eeb8e5bbecb0a66d0dccf890560b2772aaf25cfcf2943a976e8e45774626aa

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