Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1a561485046d9e…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 21:33:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5e24f02f1752a8146f270fb6074638c0 SHA-1: 1a3774bbef6a5d24c479823eb83c86b7e43d65a9 SHA-256: ee1a561485046d9ebeae0937fa1bb504643d75fac01a06e0f1c4463af04df270
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/coin-master-offline-hack-game-hack PDF link annotation
    • http://sttlets.education/senayan//repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-robux-hecku_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/best-free-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-hack-roblox-apocalypse-rising-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-eploite-for-free-download_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-online-games-no-downloads-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-free-cbro-skins_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-robux-giver-free-download_GM431946152.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
font_00_sfnt_off000032ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32CA 22580 bytes
SHA-256: 79ac3c4d1552db76d5554f45fdf135f55c4939767fe75e72329a3fdb533af059
font_01_sfnt_off00006529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6529 18080 bytes
SHA-256: 9b148c07d0dc3f850c335ec76a4603c5a5b6178ea849a51312e67b1c4b02565b

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