Malicious PDF — malware analysis report

Static analysis result for SHA-256 afcaa26aa0c7dc6f…

MALICIOUS

PDF

42.6 KB Created: 2021-06-03 23:06:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a1e31d8b31d45ffc365c71b5f4f03f2c SHA-1: c7240a002237351a97b899fdb1beb580fb3506bd SHA-256: afcaa26aa0c7dc6f397a9f2f0932eaab4cf11af45d2f91585de571d2db20045b
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 0.9874

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 https://netcdn.online/app/835599320/tiktok-free-robux-game-hack PDF link annotation
    • http://oca.undil.tl/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/pokemon-go-free-pokecoins-hack_GM1094591345.pdfIn PDF document text
    • http://oca.undil.tl/repository/coun-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-shirts-roblox-that-i-can-copy_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spin-link-today-2021_GM406889139.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
stream_004_off000048db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48DB 26548 bytes
SHA-256: f1b7923b1af9b522c2386827094183588388eb00ce9dfb0b92d4fbf9839d974d
font_01_sfnt_off000084e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E8 17964 bytes
SHA-256: 43e1083ea1ecc702cab22b5d1e2def6b9ba7ce722b91fcd98f099c05f6a66044

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