Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da9780126d80401…

MALICIOUS

PDF

33.1 KB Created: 2021-07-06 21:06:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8b0e10854a2360477451e37d96f71909 SHA-1: d8bb48a8e698ceaf33ca50d8e965e60c5c000d36 SHA-256: 6da9780126d80401b61e235024b5a33e43d227b52fc7b4e04b6c2e8391f8fa86
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains a prominent link to a website offering 'Coin Master Free Spins Cheat'. This, combined with the 'PDF_GAME_HACK_REDIRECT_LURE' heuristic, strongly suggests a lure to a malicious site. The ML classifier also flagged the PDF as malicious with high confidence. The primary IOC is the redirect URL, which likely serves as a gateway to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-cheat-game-hack PDF link annotation
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/free-robux-without-buying-apps_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/how-to-get-free-robux-ez-ways_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/case-clicker-case-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/free-server-side-exploit-roblox_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/como-hackear-phantom-forces-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/best-ways-to-make-robux-in-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/how-to-hack-grand-blox-auto-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/free-robux-website-survey_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/naruto-oa-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master_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_002_off00002e84.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E84 21832 bytes
SHA-256: 92bba8e9842d4327dccebdba4ff2cad61d53c0d2f3e888c028bd031464c7ad3d
font_01_sfnt_off00005e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E91 18340 bytes
SHA-256: 31b040f11d31e2c25a3918167828aea55bdad87c8eae0a9348126ed232a1d2b9

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