Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f05209177b3133…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 08:54:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4f703625ea33a1f86b766968133cf9bc SHA-1: 3f1b58f4de22c91e9ec51aff3f75e0dba5fd764f SHA-256: 64f05209177b3133a743d69e376998f3ce9b0519f440e8b3e6ab6f5589db87d7
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-free-spins-and-coins-app-game-hack PDF link annotation
    • http://tasleemdubai.com/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-make-your-roblox-character-look-cool-for-free_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-giveaway-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/hacks-para-mad-city-roblox-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-how-to-hack-with-ceat-engine_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/jailbreak-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-gold-cards-hack-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
font_00_sfnt_off00003256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3256 22668 bytes
SHA-256: d0c8ac7f4e358e3fb5f26c303c8d3806b4ea728365be13a548a642d4b908e998
font_01_sfnt_off0000649e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649E 18348 bytes
SHA-256: 3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85

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