Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94b1800b86fdff3…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 13:43:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3e1b3408219b206fa5dc29f980120e16 SHA-1: e9a47252ebd0d150e6ccf42b22d2dd809c05a5d7 SHA-256: c94b1800b86fdff32411b4d80c8af9403a3ea957e07c9ba7417d454e9f14b534
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary malicious URL identified is http://netcdn.tw/app/406889139/hack-coin-master-343-apk-game-hack. The document's content and embedded links strongly suggest a phishing or scam attempt to lure users to potentially harmful websites.

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/hack-coin-master-343-apk-game-hack In PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-many-tiktok-free-accounts_GM835599320.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/appsmob-coin-master-hack_GM406889139.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_002_off00002f2d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F2D 22852 bytes
SHA-256: bad1f42a519937596055ab963d0bc6174bb740e2e018697f83b616d787261b2a
font_01_sfnt_off00006208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6208 18416 bytes
SHA-256: 71d2f8e68c1f2ddfa4df4e7d7e9f9d2f4e9296d26332e2415442221fc5a89d52

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