Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f1bff264ccbc5b…

MALICIOUS

PDF

36.0 KB Created: 2021-07-03 09:59:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e3d3227c256b0047e785d816d0b62464 SHA-1: f73123dc34f0d9659bf11aa0fe8f6ab4517b5181 SHA-256: 56f1bff264ccbc5bd91e744516319bf955d76cabcdf91464120e0f58f0a81dd6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as game hacks and free accounts. The primary lure URL is http://netcdn.co/app/406889139/working-coin-master-hack-2021-game-hack, which is flagged as a malicious redirector. The document's content and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites.

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.co/app/406889139/working-coin-master-hack-2021-game-hack In PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/minecraft-net-free_GM479516143.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/xbox-roblox-free-characters_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/games-that-give-out-free-robux_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/free-robux-no-survey-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/roblox-svg-free_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/how-to-hack-any-server-in-roblox-with-script_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/robux-free-glitch_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/roblox-sword-fighting-tournament-points-hack-2021_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/roblox-free-clothes-hack_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_002_off000033d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33D1 23560 bytes
SHA-256: 8f9d9ec3fd1b8bcf50caf401d8210bf7ee0f5f4324dabe0447daa2f76a19340b
font_01_sfnt_off00006910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6910 18604 bytes
SHA-256: ca9da6d68fac19d10b0af569e3839646c035d047714faa06f15c7475283719a2

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