Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ed4952e2919fda…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 15:27:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 40f991924e65e2413c4f94cdd3f8d53d SHA-1: d6c2a17728e522eeadc276d97af84fe524276477 SHA-256: e7ed4952e2919fdaa8ca33cd3c69b3a7f3544643f32d6b49a3158890c99b4ad6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and free currency generators. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-time-speed-hack-game-hack, which is associated with known malicious redirector activity. The document body and embedded links are designed to trick users into clicking through to potentially harmful sites.

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-master-time-speed-hack-game-hack In PDF document text
    • https://privatearrangements.co.nz/public/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/robux-hack-no-download-or-verification_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-loadstring-hack_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-roblox-accounts-with-eto3k_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-december-hack-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/robux-hack-codes-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-generator5_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-get-free-items-in-roblox-no-hack_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/150-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/hacks-para-tener-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-free-robux-codes_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_off000030ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AD 22620 bytes
SHA-256: d667fb59aa392bb641532022812a1872272487976642d807a48d8ea5ac549389
font_01_sfnt_off0000631b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631B 18616 bytes
SHA-256: b78bd3f69c7e286ccbc6741afddc706e6f1c4a4cc092b12879ca9553ef35e782

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