Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65261da35e1cf2c…

MALICIOUS

PDF

42.9 KB Created: 2021-05-11 20:07:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 28b18ba7dd5a4079c0698d0997678414 SHA-1: cf7e4ce21fd99ed89e89270fa9626fe61b61c86f SHA-256: b65261da35e1cf2c211a66b6e0b6a2f30d716e4157943162d606ebc16998c778
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically targeting users interested in game hacks and free in-game currency. The document body and embedded URLs suggest a lure for users to click through to potentially malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-coin-master-spin-app-game-hack In PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/rape-simulator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/minecraft-complete-handbook_GM479516143.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_003_off00004bce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BCE 25380 bytes
SHA-256: bc404d78e14db0ac75428d952629a18074bf86c584fd54a64f8725d842b77103
font_01_sfnt_off0000869c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869C 17884 bytes
SHA-256: 6a5fc0e5ee3990f98fff047e5d02c1443490e61ce795861dff478bab25fb071a

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