Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4084648eaf671c…

MALICIOUS

PDF

32.5 KB Created: 2021-06-25 12:54:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 22a7b83aead9b7313021896a7bc2c88d SHA-1: ab2ba01dcdd34b171cc808adb4aa79afd74b8378 SHA-256: 0a4084648eaf671cfb32cc404407c17e4d31c8100f0aa64575208c2ade9b1655
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 0.9824

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.co/app/431946152/free-roblox-render-game-hack PDF link annotation
    • http://wadimor.co.id/media/imagesfiles/robux-redeem_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/hacker-programm-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/master-coin-free_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-by-inspecting-on-mac_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-free-online-play-no-download_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-com-no-verification_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_off00002a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A2F 21996 bytes
SHA-256: 87c141febde38f50ebe3e671aa5bd8e4974513f3cb448c1d2997c2f2eaf68195
font_01_sfnt_off00005ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD9 18824 bytes
SHA-256: d43d1865410758d528c2bfe04369d4ec510be83e4fc404c7b9347b03d54766ef

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