Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0d3c325872799f…

MALICIOUS

PDF

46.3 KB Created: 2021-06-04 00:01:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4247019153e31fc09b146a859acdfa06 SHA-1: bfc9dee85f22c0671141787aca76cc0313d84685 SHA-256: fc0d3c325872799f9cc6f548ff912bbef100bf8d6aec66d62aad49751d290c48
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links pointing to a URL associated with 'free generator' or 'game hack' lures, indicating a social engineering attempt to trick users into downloading further malicious content. The ML classifier also flagged this PDF as malicious. The primary IOC is the redirector URL used in the lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/how-to-get-free-robux-codes-2021-game-hack In PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/tiktok-free-like-app_GM835599320.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/tiktok-free-followers-generator_GM835599320.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2A 24492 bytes
SHA-256: 31d56226699cbf2e776540aab6594aa03a5d86d4ccba8e65b5b056a304bf63d3
font_01_sfnt_off00008652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8652 2832 bytes
SHA-256: 78e89c8f621d90011ffb7a2107d701d4cdf090a2f2cf42d5a65297289afc8805
font_02_sfnt_off00009003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9003 18856 bytes
SHA-256: 204886f9a3a3d456a8ba924f34e84de86e5dda13901e78a872ce278a746af401

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