Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b39219723f11be8…

MALICIOUS

PDF

36.0 KB Created: 2021-07-08 12:30:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 63e68c5edf99bc9e3da4595b863f7550 SHA-1: d7077d99462c0ed35c33f2637b05d0a1592bcd91 SHA-256: 4b39219723f11be814bc7ce3fbc0bd89b4a33f781a728038db4637d1d67fb783
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a link farm, that direct users to websites offering game hacks and free in-game currency. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" lure further supports a malicious intent to redirect users to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/como-hackear-coin-master-2021-game-hack PDF link annotation
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/are-free-robux-games-botted_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/free-robux_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/roblox-how-to-free-robux-for-free-with-out-hacking_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/robux-generator-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/pokemon-go-free-pokeballs-no-human-verification_GM1094591345.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://ellobo.com.ua/ckfinder/userfiles/files/links-to-get-free-spins-on-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_002_off000035b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35B3 22872 bytes
SHA-256: 59480ab2464565341989c8da209b9178a59af7d5f606abe027be9f7d8c2d2c7f
font_01_sfnt_off00006926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6926 18664 bytes
SHA-256: edb2623ad104b8b86e5bc1c5ef1b50296b358dc4eff6a16b1f212eab3163f8bc

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