Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a8c3992165d4ad…

MALICIOUS

PDF

35.7 KB Created: 2021-07-03 21:39:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2c809702030c36774aae31deab9ad6ab SHA-1: 1a427a483cd61559da4c6d0665740169bc033d55 SHA-256: 02a8c3992165d4adaf05acd560b5f10c8a54af88a7f7e61dd7d39c1c6df8e5ca
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.tw/app/431946152/free-roblox-toy-codes-list-game-hack PDF link annotation
    • https://key8013805.com.tw/upload/files/buy-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/i-got-hacked-in-wierd-writing-roblox_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/clients-minecraft_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-studio-online-free_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/glitch-for-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/pokemon-go-free-1km-buddy_GM1094591345.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-backdoor-hacking-roblox-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/play-kill-hack-roblox-v3rmillion_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-system_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

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_off000032b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B3 22840 bytes
SHA-256: 312aeee2937b718a972537b501dac46e3d373244cc59673c0a53da7f97f736d1
font_01_sfnt_off000065ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EA 19228 bytes
SHA-256: b2f0d6fa885786e76748f7fd0c7a8f4ae969afcd035f024bf48c21d5b127085a

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