Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b1c8c70e0b63ab…

MALICIOUS

PDF

32.4 KB Created: 2021-07-03 16:41:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 17e00406dbd0fe42beb8655a7787705d SHA-1: c8728eeaf8d9447ed44e2b8961b0860fa3def00d SHA-256: d9b1c8c70e0b63abef5a483a3da2566726d68a7c4c61a1a77450ece9a05ef6cf
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as 'free generator / game hack' lures. The document body and heuristics indicate a strong attempt to trick the user into clicking these links, likely to download a second-stage payload or phish for credentials. The presence of a password-protected archive lure further suggests an attempt to bypass security controls.

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.
  • 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
  • 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.tw/app/835599320/free-tiktok-likes-game-hack In PDF document text
    • https://library.uigm.ac.id/repository/free-promo-code-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-do-you-get-lots-of-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-followers-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-tix-roblox-pbb_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hack-week-crafting_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/theme-park-tycoon-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/robux-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hack-pritty-face-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hack-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/dugeon-quest-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/jailbreak-hack-music-free-roblox_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_off00002d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D04 21640 bytes
SHA-256: 2adfd449687c6d4665622fff247eea08f3e901e6eff7aba29a70c27533626555
font_01_sfnt_off00005ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA6 17972 bytes
SHA-256: 283ebcfd12b67b7bd682b0c5d47b667ee3bfb492ef607fea700d9ef700d73bd7

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