Malicious PDF — malware analysis report

Static analysis result for SHA-256 e386beeac47e7bd3…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 10:13:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c490ce6dc44177ffd1e450b599e3b21b SHA-1: 26163d8efb88b10e8d0bbbef0aa0fec3b5b941f6 SHA-256: e386beeac47e7bd370baca6e7bacd94b37127cbf6d7ca978569ad178d09eef0d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures related to game hacks and free currency generators. The primary malicious link identified is https://netcdn.online/app/431946152/roblox-robux-generator-no-human-verification-game-hack. The document's structure and embedded links suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/roblox-robux-generator-no-human-verification-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/robux-match_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/tiktok-ui-kit-free_GM835599320.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-2021_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
stream_004_off00005499.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5499 26212 bytes
SHA-256: 6a1e1e372c294d3919f97ad08f97cbd394173640c8536e398d4c6cf0d64a8f7b
font_01_sfnt_off00008f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F87 18772 bytes
SHA-256: d70e1896760ce565ff795a6c5d74f9ef69d680ae9e1e6e3d1ff99995b7d1b431

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