Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b8ef64b8b944f2…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 12:53:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 69c413a3eef16dc3aea58db10651a18f SHA-1: 8d81250278e453f83c762700b6012be59f5a7524 SHA-256: 67b8ef64b8b944f23246b66e3104060d02c704a3d839b88f41a740b26ac29aef
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The document body confirms this lure, directly embedding the malicious URL. This indicates a phishing attempt designed to redirect users to potentially harmful content or further malware delivery.

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.tw/app/431946152/free-robux-no-offers-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-alternatives-to-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/hot-to-get-free-robux-2021-may_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/bloxburg-roblox-how-to-get-multiple-floor-free_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/hox-to-get-free-item-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/raw-paste-data-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-instant-catalog-item-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/any-gampepass-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/pokemon-go-free-raid-pass_GM1094591345.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/hacks-for-fallen-that-actually-work-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-rewards-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_off00002fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCC 22340 bytes
SHA-256: 1a5d354469d0749a500346ca8bca121de6a1120218f83af6f683245d768553ba
font_01_sfnt_off00006174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6174 18716 bytes
SHA-256: 6cef72b87605a464df8901898d024a902d738decefc8e487a7362df6534fb924

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