Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f85b1b071461b2…

MALICIOUS

PDF

35.3 KB Created: 2021-06-30 12:23:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c695707e3d03e245a53536e6eeec418c SHA-1: 081a42345f7af346c10f277419a3e8fd36cfa356 SHA-256: a1f85b1b071461b2a7f8a170b6a2e165fa7b6e2da5ecce82a0a05c325bc8ed5e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that lead to known malicious redirectors and pages offering game hacks. The primary lure appears to be related to Roblox and Minecraft, aiming to trick users into downloading potentially malicious files or visiting further compromised sites. The ML classifier strongly indicated maliciousness, supporting the observed redirection behavior.

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/roblox-mod-free-robux-apk-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/comment-cheat-sur-stand-online-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-limited-items-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/can-simeone-hack-your-roblox-account-theough-discord_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-player-cheating_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox-with-cheat-engine-561_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/new-roblox-hack-exploit-for-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-ticket-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-live-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/invicibility-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-swordburst-2-cheats_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-boombox-backpack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-de-free-drive-roblox_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
font_00_sfnt_off00003130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3130 22532 bytes
SHA-256: 4c4b7e589328b603ddfb8653b6fa958e3284e968861e58b3c4973b79f7abca83
font_01_sfnt_off000063a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A6 19504 bytes
SHA-256: f23c2ccf410a2a6b078fd7a21f8b0676d9b1df03317fd8bb54f64fcd291c7099

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