Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3e174c304149f0…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 13:18:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d291525b5c23b164f83ddd7ece064a2a SHA-1: 75c917a5a67ffb77def959a2f8d3477406cbd35c SHA-256: 5f3e174c304149f05e483a9ade7c0a0917d936e1e88e6015503d39b78e8c1f38
82 Risk Score

Malware Insights

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

The PDF document contains a high-severity heuristic indicating it links to a game hack lure. The document body and extracted URLs confirm this, pointing to a URL designed to trick users into downloading or accessing potentially malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/coin-master-download-hack-ios-game-hack PDF link annotation
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-how-to-put-gear-on-free_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/get-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/pubg-uc-zing_GM1330123889.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-song-id-hack-script_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-robux-for-free-on-pc-windows-10_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/cm-spins_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-game-uncopylockedf_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-pe-016-0-apk-download-free_GM479516143.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_off00002ecd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2ECD 22684 bytes
SHA-256: 1221b7b5720ed4e1508cd195d27a87535c6232f90c628dd027f3074b413365e9
font_01_sfnt_off00006192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 18584 bytes
SHA-256: 0cc53e6ff5965a6bde6e826f187bf2e09f3f61dfd66a91e989fd5a35dba691c6

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