Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8a451a891d09d3…

MALICIOUS

PDF

42.5 KB Created: 2021-05-16 07:09:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 06c1c9e95a382e4d99c266eba885a2b7 SHA-1: 9b5451e2496b612f68e77bad8d1dd769843de431 SHA-256: 9b8a451a891d09d344587e8ef1190fc10b23b68e17affb80c1882b0cc9cb62df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to known malicious redirectors and infrastructure, disguised as offers for game hacks and free currency. The document body, though partially corrupted, contains references to these lures and embedded URLs. The primary function appears to be redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-spins-coin-master-links-game-hack In PDF document text
    • https://i-photo7.com/image/data/files/earn-robux-sites_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/mistplay-robux_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-minecraft-client_GM479516143.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_off00004b1a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B1A 25524 bytes
SHA-256: 1426ce2cddcaf9c5a865664ffe7552258d06a7aaea5322bd4948706ab296eb9e
font_01_sfnt_off000084a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A9 18056 bytes
SHA-256: 07f1a9832fff0ce02b8ea8bcbd6448fb7022c7ac6c85a00fb5b887865844234a

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