Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3932cdfc01fb468…

MALICIOUS

PDF

34.9 KB Created: 2021-07-09 02:43:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8a67d13d92f466d7f1e7af8233f39a92 SHA-1: 0a123d4bb2cb0b0d7743a9c49020886ff10d9945 SHA-256: b3932cdfc01fb46845f29cdfce472c96ff33ffac5b4ea82192751fd985f0571a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and websites offering game hacks and free currency. The primary lure is related to 'Coin Master' and 'Roblox' cheats. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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/is-there-an-actual-hack-that-work-for-coin-master-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/pokemon-go-free-codes-november-2021_GM1094591345.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/wurst-download_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-gift-codes-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-create-avatar-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-free-auto-clicker_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-script-hack-cheat-engine_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_002_off00003090.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3090 23212 bytes
SHA-256: 320ad0f8aa19d636ec5950f1b0b3e3dd1ed32806622f0d2ede41f5a1fa809cf1
font_01_sfnt_off000064d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D0 18748 bytes
SHA-256: 70d8a6fcbd9ac0ba89798b1012dd9215a581b425ea259d5a400b2b7b2d81c089

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