Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6b782d7ae7c3d7…

MALICIOUS

PDF

41.8 KB Created: 2021-05-19 15:03:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 233d1c3a93b0f9310a0c8fb296b07d81 SHA-1: 5feba6fbb18271f73bd69e09de693f0490d495d5 SHA-256: cf6b782d7ae7c3d7925299aa1669e762136c37aef379171125e768263e73142f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, indicating a likely attempt to redirect users to malicious websites. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" lure reinforces the malicious intent. The document body, though partially corrupted, contains references to "Coin Master Free Spins" and URLs pointing to game-related hacks, suggesting a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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-free-spins-bit-ly-game-hack PDF link annotation
    • http://sbm-nn.ru/images/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/pubg-uc-buy-in-pakistan-jazz-cash_GM1330123889.pdfIn PDF document text
    • http://sbm-nn.ru/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47FE 24788 bytes
SHA-256: 37ba0cf7cbe9996db0b873e9d849d7cb2873d29c5d8f0a2106e268d2487b31b3
font_01_sfnt_off000080d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D9 18280 bytes
SHA-256: 30193a21741cc5402413da2ce8c3dbb562d342d001498cd3d21d10b4bea75843

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