Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c00c880983c25dc…

MALICIOUS

PDF

46.8 KB Created: 2021-05-10 23:47:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9a061ca7aa57c49c263ba0e85523d94b SHA-1: 954dbebecc10f65eac46e2e115f2b92d7eb195cd SHA-256: 6c00c880983c25dcdad967b6999b623f44dddbb30830e7ea16d374d0bd138238
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a seed-phrase/secret-recovery lure. 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 0.8948

Heuristics 5

  • 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.
  • 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/coin-master-free-spins-2021-app-download-game-hack PDF link annotation
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-spins-link-download-for-iphone_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D7B 24816 bytes
SHA-256: 235ffe90f101d2bd83157705c07335cba278f68e6a162846d2cce1f03c5a54c7
font_01_sfnt_off000086f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F0 3500 bytes
SHA-256: e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
font_02_sfnt_off00009291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9291 18868 bytes
SHA-256: b751cdaf37495e2cbea790aaa61ad6b08870d96184a8696588416af24de27b3d

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