Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4f39fb8060241d…

MALICIOUS

PDF

43.5 KB Created: 2021-05-12 05:30:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 302e61dd2c9bc4a22aaab97f728d2358 SHA-1: 8551fa2a4601a7ab8e2e744efa13be27c5865134 SHA-256: 1c4f39fb8060241dea1773c922dcce2723a709c068a842e91fe1e83d3c6af6ba
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are SEO-optimized and appear to be part of a link farm. The document body and extracted URLs suggest a lure for game-related cheats or currency, which is a common tactic for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/get-free-spins-coin-master-october-2021-game-hack PDF link annotation
    • http://stitqi.ac.id/website//repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-twitter-free-spins_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_off00004cc5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CC5 26416 bytes
SHA-256: 78f6f2a3bdc820488426802b7c8ba730966b1f3490e23018b0b67c27015c1a36
font_01_sfnt_off0000870d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870D 18444 bytes
SHA-256: b16824f866cbb0b2e3293a2fc4d3ea97589f6ec0209b9c1fbefadf3e0951670f

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