Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d300ba982dc633…

MALICIOUS

PDF

46.3 KB Created: 2021-06-09 06:01:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 35d9ab647d23d7623ef4c9b6cd37efbe SHA-1: 40f4c681f749d5fb1c5af221f43e678408b27986 SHA-256: e7d300ba982dc63340706037e777676d6a47bca8c841211d7c42aaf96d0ec68a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to attract users with promises of free in-game items. The document body and heuristics indicate a lure for free game passes and Robux, a common tactic for phishing or malware distribution. The presence of PDF_SEO_LINK_FARM and SE_PASSWORD_ARCHIVE_LURE heuristics strongly suggests a malicious intent to redirect users to potentially harmful content or trick them into downloading malicious archives.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/431946152/how-to-get-free-gamepass-on-roblox-phone-game-hack PDF link annotation
    • https://htdvn.com/public/upload/files/groups-that-give-robux-for-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-pubg-uc-without-human-verification_GM1330123889.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/mistplay-robux_GM431946152.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_004_off000050a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A6 27688 bytes
SHA-256: e23102a5464ebb8fe705dd30db6c3822a5fe766620cbf5ff9d70154c37c4c113
font_01_sfnt_off00008fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE9 19200 bytes
SHA-256: 144a69642936b0bd4b414533bdf9d72a735d8a245325d2813f80fa12a5eb4166

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