Malicious PDF — malware analysis report

Static analysis result for SHA-256 d721314da4e9fba1…

MALICIOUS

PDF

42.9 KB Created: 2021-06-03 06:45:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4ad2d2f2499b5d52da0c71a0f1a36da7 SHA-1: 18a807b16d8a9ddaca8aee9a61037db1b91fd356 SHA-256: d721314da4e9fba151b6db2563160f6df21cb0c26f2563f9cce509e7656f9328
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a malicious URL. The ML classifier also flagged the PDF with high confidence. The embedded URL is designed to trick users into downloading a malicious payload, likely exploiting a client execution vulnerability.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/406889139/2021-free-spins-coin-master-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/www-rubux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-daily-free-spins-link-2021-today_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_off00004e2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E2E 23944 bytes
SHA-256: d05971364f4c4d9607f4dd1aac0e8c637bd221df6499dbc7d57d7b57619e78ab
font_01_sfnt_off000084c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C9 18288 bytes
SHA-256: d5a46c40ddaffffdec7b194e78d64597afed9f46b5e12e45e50a00bb771aa4a6

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