Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4069544b48121fa…

MALICIOUS

PDF

44.8 KB Created: 2021-05-16 02:10:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3f737418c06cab08abaf0d25d912a124 SHA-1: 8c50385d629447c20800c4967a4437320556cf02 SHA-256: f4069544b48121fa57db3aef5dc62eea0e07ea989f7dec6542f4a245595ef65b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link that masquerades as a game hack generator, aiming to trick users into downloading a payload. The document body and heuristics strongly indicate a social engineering lure for malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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 https://netcdn.xyz/app/406889139/coin-master-card-hack-app-game-hack In PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/wurst-18-9_GM479516143.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/wurst_GM479516143.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-114-download_GM479516143.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F3A 26760 bytes
SHA-256: 4da1760209d08597ed452d1f98b13c09a44615eaf7d3cbfdd31009a69ae0ef21
font_01_sfnt_off00008d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9A 18068 bytes
SHA-256: 253c022fea36e2edfdded8e932a5d2c5ace7c2c75107348eb73538d72e63084f

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