Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd0592fbc7846d1…

MALICIOUS

PDF

42.7 KB Created: 2021-05-11 13:34:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 638de87b61849ee91f42f11324952f3d SHA-1: 56e8c3e77034f7b05b8ba0e68c213caecc0e5823 SHA-256: 6fd0592fbc7846d14d45c81f410512d3188308ff83a504f9bcbc4e60ec35686b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with a primary link pointing to a known malicious redirector infrastructure. The document body and heuristics indicate a lure related to game hacks and generators, likely intended to lead the user to a malicious website. While no scripts were explicitly extracted, the presence of PDF link manipulation and malicious redirectors suggests an attempt to download or redirect the user to a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/roblox-ban-game-hack In PDF document text
    • http://lib.icbc-indonesia.org//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/i-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://direct-link.netIn 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_off00004a44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A44 25368 bytes
SHA-256: 284243ee086bbbaeef126d719bcf09b064b214d124a5c21d965c71fb16339fdf
font_01_sfnt_off0000853b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853B 18012 bytes
SHA-256: ee811b275408340e5acfbb9d33bdd3014b8f6a1fd2105455b61057784e541bf1

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