Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc0b035d168c2e3…

MALICIOUS

PDF

43.0 KB Created: 2021-05-11 22:06:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9dbb802e1aa7230a450390f6402b5e50 SHA-1: 2c2d3f53727252e7959392e0e6b0fc41a0f770d0 SHA-256: 1fc0b035d168c2e314f8479fea0c0d290635c2b4d1f3670e4820e73758e989d0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or content-loading mechanism. The document body and extracted URLs indicate a lure related to game hacks and cheats, likely intended to trick users into downloading further malicious content or visiting compromised sites. The ML classifier strongly flagged this PDF as malicious.

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/real-coin-master-hacks-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-villages_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.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_off00004d4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D4B 25300 bytes
SHA-256: 8ab18d80bb4aa9866244533e4f51a74a13045b78c1944717af11e471897d7083
font_01_sfnt_off00008764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8764 17788 bytes
SHA-256: c971b34c329d205054a16b1b5f827a74783bca0f841d374511d085dfea161b8f

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