Malicious PDF — malware analysis report

Static analysis result for SHA-256 20af10f4093b837d…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 13:49:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 54aba8da72479b1c7d1414a138f6aa3a SHA-1: accac788a14ff525acd0f784831643b8cbba3b49 SHA-256: 20af10f4093b837ddbd8785524ae138305fc87e88b2c91ad1e39d6e4e0f3d606
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering 'free spins' or 'robux'. This indicates a link farm designed to lure users to potentially malicious websites. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is part of a scam or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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.
  • 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.xyz/app/406889139/online-coin-master-free-spin-app-game-hack PDF link annotation
    • https://eurekaaccounting.co.za/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/robux-game_GM431946152.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/robux-free-co_GM431946152.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://eurekaaccounting.co.za/images/how-to-get-free-robux-website_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
stream_003_off000048d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D8 28932 bytes
SHA-256: 9e5f298550aa8c4d4232c767ca907cb6da1f19ee103da40c2b552d91ae474d7a
font_01_sfnt_off000089a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A5 17960 bytes
SHA-256: 00bab635c2a0cb1a50d20431aa9d2604bce9bd5ee105395901c4159e72e6ab85

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