Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da1113b07b1aaa4…

MALICIOUS

PDF

34.7 KB Created: 2021-06-25 17:37:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5349a262da39511feb6cdee1ac3294fc SHA-1: 9c15cacc7f7b055aa08327a11f39ec3229cd1396 SHA-256: 1da1113b07b1aaa48bc12f0460cfc293632790f05e120c218818044ca9105da1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/free-gaming-roblox-recording-game-hack. The document body and embedded URLs suggest a lure for game-related cheats or hacks, likely to download further malware. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/free-gaming-roblox-recording-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-me-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/dead-mist-2-hack-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-roblox-gift-card-numbers_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-apps-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-change-username-on-roblox-for-free_GM431946152.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_off00002dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDE 23076 bytes
SHA-256: 94957d13a09d677a96173d05c2db46f942afe3b31cbaf6b9ccbba85125dd16c6
font_01_sfnt_off00006205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6205 19204 bytes
SHA-256: 13b6043c3ee84f3ba507391cdcc9e073bece4687e61cb0b0e7f80d555e59d559

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