Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3077a0b32d0c9d6…

MALICIOUS

PDF

50.2 KB Created: 2021-05-11 04:34:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dcd45371568ee77159bc62a00bd63332 SHA-1: 64d1cc89677996fb33685edf3f7a6786ccdfa28e SHA-256: f3077a0b32d0c9d6eaba8a426789384b2eeb6307b59a8f5e97f355d4ac4d6b5d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to external websites, including one pointing to an IP address, that are disguised as generators or hacks for popular games. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document likely attempts to solicit sensitive information such as private keys or passwords. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

Heuristics 6

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://netcdn.xyz/app/406889139/free-coin-master-generator-game-hack PDF link annotation
    • http://110.78.114.242/ckfinder/userfiles/files/real-robux-generator-2021_GM431946152.pdfPDF link annotation
    • http://110.78.114.242/ckfinder/userfiles/files/coun-master_GM406889139.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/add-robux_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cbc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CBC 26832 bytes
SHA-256: c2eeadf78ba5d0eb2a54682ff11bc84a497e11c592b04eb5fcfaaa6dae1d6025
font_01_sfnt_off00008969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8969 3460 bytes
SHA-256: 582708023ba280d4d50e04d3196ed4a98a24323596270ce5a55f31618faa5208
font_02_sfnt_off000094d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94D7 19040 bytes
SHA-256: 63673a54296104c7c1eabb77055d06047b083e4ff724a5120f52461e2c582b2d
font_03_sfnt_off0000b92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB92A 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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