Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b8ae02c71c40d9…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 07:58:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3a9b374d6fba51656ad5bfd5fe1b5816 SHA-1: 0a6919ef56ea7cea6033d42cdb2e7abd4acd64bf SHA-256: d0b8ae02c71c40d9946beb416ba19d9695402e8d6b4f0596dff5fc57e7062e82
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-spin-link-game-hack, which is flagged as a known malicious redirector. The document body and heuristics indicate a lure for potentially unwanted or malicious content, likely leading to further malware downloads or phishing attempts.

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/406889139/coin-spin-link-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-giver-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-how-to-play-treelands-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-much-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-draw-2-how-to-get-good-drawings_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/boxing-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-com-free_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_off0000303d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303D 22868 bytes
SHA-256: 081fc02470266754fbd81245e90da4495b6aad2a3285e634091391a16de37d5e
font_01_sfnt_off00006399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6399 18076 bytes
SHA-256: 28c3bbbb127f0926d8e21afd24f58e7e1c0ea518f1d6266cc8eb2e2b41c2b2be

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