Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2aa37d216fdf67e…

MALICIOUS

PDF

31.2 KB Created: 2021-06-22 11:20:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fd88fd086b9d34d364c53759d871334e SHA-1: b7ea3ade38c5b390829a736727556db5810b11e4 SHA-256: d2aa37d216fdf67ef603d0bd21df44d83ed8271eee5be62bf1a63e922cf4a0d3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains links designed to lure users into clicking on them by promising free game currency or hacks. The primary link, http://netcdn.co/app/431946152/free-robux-obby-no-password-game-hack, is identified as malicious redirector infrastructure. The document's structure and embedded URLs suggest it is part of a phishing or scam campaign, likely using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 3

  • 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.
  • 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-robux-obby-no-password-game-hack In PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-can-you-hack-get-coins-in-roblox-knife-capsuls_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-tracker_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-hack-on-roblox-rap-battles-2021_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-cheat-money-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-catalog-roblox-java-script_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/real-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3421 22200 bytes
SHA-256: a3de6097d82cf3dfa2a421c8e74988a60386df4d7c816d3df2ac350f97cbe85b