Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a76e24fa621fc9…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 05:54:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5ecc67200848caafed3210e9a98c8cf4 SHA-1: 70c9b153c2522b3b991c048f87681eeb33234121 SHA-256: 46a76e24fa621fc97c372140d78e76f42977c8aa81ec3e7010c98abb38acf3e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple links to a known malicious redirector, disguised as a 'free generator / game hack' lure. The presence of a visual download button and the overall structure suggest an attempt to trick the user into downloading a payload. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which could be used to facilitate the download or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/20-free-spin-link-coin-master-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/pubg-uc-telegram_GM1330123889.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_004_off00004e8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E8E 24396 bytes
SHA-256: 2c6e2224d9c41c58ab3f2f14ed5f4a0f82ef2d8ec15f83d6274cab2aa1e65535
font_01_sfnt_off0000868a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868A 18352 bytes
SHA-256: 4dd766e4f27b72d6e8e66c439aca94e2b7f3531775cf9d126f518490910b573e

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