Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b170a85ca84402…

MALICIOUS

PDF

34.3 KB Created: 2021-06-28 20:54:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a0412069d0d535cc65f676f90295b26e SHA-1: 1a1ff219357f6e1c0f63dec7e2c6130103576bb2 SHA-256: d5b170a85ca84402055ef8b60b075d8c437dd697d0fcbf6a5b67e13b3fcac882
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/free-robux-real-2021-no-human-verification-game-hack PDF link annotation
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/coin-master-tips_GM406889139.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-level-8-exploit-roblox_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/roblox-jailbreak-how-to-go-through-walls-hack_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/pokemon-go-no-free-box_GM1094591345.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification-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_off00002ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE9 22480 bytes
SHA-256: acf3b779b62e1261c0520223f2b27079633ab453ef85ed0ea97c75a56cde47b0
font_01_sfnt_off00005f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4E 19812 bytes
SHA-256: ed4af0dd90b58a737ab0c507ba69840896ebba02e995687a848048bbb799e6c7

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