Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af52d47a55ca888…

MALICIOUS

PDF

35.4 KB Created: 2021-07-07 12:43:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8b1096b9df988d5a41ea02589a960cfd SHA-1: 8fe7e94deafcfd3370d18c5a613f1101ffcf350f SHA-256: 7af52d47a55ca888ea3cd595a65dc56b7a5001c6bd9d725d6394023d3f90a352
160 Risk Score

Malware Insights

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

This PDF document contains a link that redirects to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body and heuristics indicate a lure for free in-game currency or cheats, which is a common social engineering tactic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-coin-master-spins-blogger-game-hack In PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/roblox-one-piece-mythical-fruits-hack_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/free-build-sims-4-roblox_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/roblox-hack-rape_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/free-wallpapers-for-roblox-fps-games_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/village-3-coin-master_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/roblox-cheats-without-builders-club_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/free-roblox-avatar-editor_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/roblox-dragon-ball-ragw-hack_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/roblox-free-no-download-unblocked_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
stream_002_off000033e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E5 22916 bytes
SHA-256: daab157b1100244f41ac944f930dc37535ab5ba9978210890e67e48b7353e3aa
font_01_sfnt_off00006769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6769 18464 bytes
SHA-256: 4bcaff5a2789d7186c9fa4ee96d365b8eba602a20bbe86fe3da838c25a781984

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