Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f9db290e717104…

MALICIOUS

PDF

34.8 KB Created: 2021-06-28 16:41:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e814cae59c03057b8c2f01a7ddcb4e3f SHA-1: 356177812180f0b4e355a52fa121a07ca2cc8687 SHA-256: a8f9db290e7171040c99f8ca02326d09c91c1c2a74155aae58a13d4dc0d4d85b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, designed to lure users into clicking on offers for game hacks and generators. The primary link, http://netcdn.co/app/431946152/how-to-get-free-coins-on-assassin-roblox-game-hack, is part of a chain that leads to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

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/how-to-get-free-coins-on-assassin-roblox-game-hack In PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/como-atravesar-paredes-en-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/free-roblox-robux-generator-2021-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/fortmartin-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/hack-aimbot-para-roblox_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/easy-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/download-phantom-forces-roblox-aimbot-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/como-hackear-la-cuenta-de-alguien-en-roblox_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/inject-hack-roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/free-robux-site-better-then-irobux_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/como-hackear-roblox-2021-en-juegos_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/hack-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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_off00003231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3231 22040 bytes
SHA-256: f38691ff9a819939d9d5d2ce30ada2b64dccd6062293dfb6a6518cbeeebdd5c8
font_01_sfnt_off000062ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EC 19036 bytes
SHA-256: ed1a7d2895ae3675fd9dd73658c9a2a804373f80afcfd3aee5f23f99fc236023

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