Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf78a0c252a20562…

MALICIOUS

PDF

35.0 KB Created: 2021-06-20 07:51:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 39e2fd1c625b605df3801d27fcb34f80 SHA-1: 18651c0cfd6beb4c7c37933b1ac493dd7d648f17 SHA-256: cf78a0c252a205627b40d5ebf79c55694155cc701150bde8ad3991aa81655e73
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 0.9980

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/dj-khaled-for-free-roblox-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/how-to-get-roblox-clothes-free_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robux-cheats-that-work_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/test-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robux-without-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-account-roblox-passebin_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/tiktok-free-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-games-and-to-run-fast_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-account_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000309a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309A 22688 bytes
SHA-256: dc2902f9394b92d34dcede6ed3189ea91f4795dcf1b922c3ff9a9ae3c267da6c
font_01_sfnt_off0000630c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630C 19348 bytes
SHA-256: d7f8add4febeeb204d809bbd33d5a1d379c1da076e3d2de4d639e9d0a3faabca

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