Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7d622d5a9a5271…

MALICIOUS

PDF

41.7 KB Created: 2021-05-11 19:05:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ae09c3793e6a70cc057a3f2254c9c06a SHA-1: 24bdc5133ed944954fc5c7d532950049074e1c45 SHA-256: 8a7d622d5a9a52719164091acb7b1e8625bbf86e4797d1a4b97b788928284a01
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to websites offering game hacks and free accounts, such as 'coin-master-apk-mod-game-hack'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users with deceptive content. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-apk-mod-game-hack PDF link annotation
    • http://www.mosaikshop.at/images/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.mosaikshop.at/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-hack-tool-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
stream_003_off0000491f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491F 24788 bytes
SHA-256: 7d74a112bf518b7111af678835a98e2c12b8ea5fe1242501b103827187e321a5
font_01_sfnt_off00008103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8103 18068 bytes
SHA-256: 2c3cf7250ac5d61567888116a17491d74a4f396c7f94827d3a6194a9a0c7da5e

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