Malicious PDF — malware analysis report

Static analysis result for SHA-256 60134555d2bee16a…

MALICIOUS

PDF

44.5 KB Created: 2021-06-09 12:26:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: baf840df70054b179c561c205e1d8485 SHA-1: 7ece12fd3bb587858205f42765b52ef1d88411bf SHA-256: 60134555d2bee16ae5d55db26e19cdb22632c481c42a724e5b46bf9a556a2176
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as a lure for free game currency. The document body and extracted URLs strongly suggest a social engineering tactic to drive users to potentially malicious websites. The presence of embedded URLs and the 'free generator / game hack' lure indicate an attempt to trick users into clicking through to a compromised or malicious site.

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.tw/app/431946152/how-to-get-free-robux-on-mac-2021-game-hack In PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/hacks-deathnote-roblox_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_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
font_00_sfnt_off000052fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52FA 23728 bytes
SHA-256: 90ccb951c033ace755b3f5d22c3371bf7167dce71504f6abe84befb303dddea4
font_01_sfnt_off000088bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BB 19108 bytes
SHA-256: 0ac2efff3938be6b030d17b84ecaff28a1b2efdafd5f83fd6842f55ad223fd35

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