Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1753dfc694e8766…

MALICIOUS

PDF

34.8 KB Created: 2021-06-26 03:37:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2f3e063a0c1a152dc53332e9b77017f6 SHA-1: 69e056a41cd7cbecd6207c884a74fc4e6ffcef6f SHA-256: e1753dfc694e87661c904aa0bebe82ebca54ef7abf1760899549aaafec854c2b
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs that lure users with promises of free game items and hacks, such as 'free Roblox Robux' and 'Minecraft free download'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful sites or downloaders. No scripts were extracted from this sample, but the document body and heuristics confirm a social engineering tactic to trick users into clicking malicious links.

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.co/app/431946152/free-roblox-robux-no-human-verification-game-hack PDF link annotation
    • http://www.valenciamaids.com/userfiles/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-codes-for-roblox-live-now_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/working-roblox-hacking-dll_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA2 22620 bytes
SHA-256: 78f99395eaa97a7827bed8ec73ae82972b8a22d55894d63c58dcb19aa662a2bf
font_01_sfnt_off0000620f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620F 19408 bytes
SHA-256: 932e4b9fdff4a527244671bf5a4be2648446bc06ac20ea47f01dea128fdceeff

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