Malicious PDF — malware analysis report

Static analysis result for SHA-256 476bfdbd1e7e753e…

MALICIOUS

PDF

36.4 KB Created: 2021-06-22 15:51:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: eda46fc0c871abc7871be2efa978509c SHA-1: aa51ae789326886f9a9f48bc59279a916590d0d8 SHA-256: 476bfdbd1e7e753ea89980e47e508697dd625666f22cc6e1cbc0450a38b05925
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'generators'. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a fake generator for games like Roblox, designed to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/survivor-hack-scrip-t-roblox-pastebin-game-hack In PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/wild-savannah-roblox-how-to-change-colours-hack_GM431946152.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/who-tiktok-free-views-and-likes_GM835599320.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/hack-para-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/free-robux-no-verify-or-password-needed_GM431946152.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/roblox-game-pass-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/robux-today_GM431946152.pdfIn PDF document text
    • http://www.pentathlon.org.tw/data/file/userfiles/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
font_00_sfnt_off00003646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3646 22444 bytes
SHA-256: 837c478c97a81c8f20ba2037cbe180228c88bb139ae280f607f768dda1142337
font_01_sfnt_off0000680f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680F 19464 bytes
SHA-256: 43804a42b1503755afe97393afc70873fcf1dd94fd8a9802983ab7a791801acd

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