Malicious PDF — malware analysis report

Static analysis result for SHA-256 9292e7e3afc1205e…

MALICIOUS

PDF

46.2 KB Created: 2021-05-13 08:03:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 28f9cb75e675135f018547706a3e76a2 SHA-1: 8fc68b2afed6d032f45646594ec45988ff7112cf SHA-256: 9292e7e3afc1205ef6dd1352bc195255fb722efc43a77b60fcb75025fb19b5ba
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure, directing users to the URL https://netcdn.xyz/app/406889139/hack-to-get-free-spins-on-coin-master-game-hack. This, combined with the ML classifier flagging the PDF as malicious, strongly suggests a social engineering attack aimed at tricking users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and the nature of the lure point to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/406889139/hack-to-get-free-spins-on-coin-master-game-hack PDF link annotation
    • https://mawaridschools.com/uploaded_files/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-deals_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/rbx-claim_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/mc-hacks_GM479516143.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B43 29412 bytes
SHA-256: 08c6ce018c07f3fc2d21a45defc66553b0b430cb1821e8ad58de648d5e992ade
font_01_sfnt_off00008928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8928 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000092da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92DA 18056 bytes
SHA-256: 2fbb404e8dbae95b2969f6d33f181e6a84e8673995acec3e52dde22e48280f02

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