Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b761379976bd03c…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 09:29:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 826b84f49d25de8af954c00995298fbe SHA-1: 07d4b3e9a4e9ce70ec5b03ab0e7fdc443e1efa0f SHA-256: 7b761379976bd03cf1ad053a4899ac49c0dd9d52ffd1defcf8369a8f19abccd5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically advertising 'Coin Master 2021 game hack' and similar lures. The document body, though heavily obfuscated, contains references to these lures and the malicious URL. The presence of these links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

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/coin-master-2021-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/pubg-uc-free-redeem-code_GM1330123889.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/cm-spins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-apk-35-11_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_004_off00005148.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5148 24568 bytes
SHA-256: 58544dcf93b08a70d283cb7f4b46adf83d15a86c3f7b0a3c9eef9230585940b0
font_01_sfnt_off000088eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EB 17948 bytes
SHA-256: 6698963cbb1d852d96c53ab93a77ac893ef1ba4f062b6059a57d43c99368daf9

Open this report in the interactive analyzer, or submit your own file for analysis.