Malicious PDF — malware analysis report

Static analysis result for SHA-256 32be6db06fef80c3…

MALICIOUS

PDF

34.7 KB Created: 2021-06-17 16:37:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7a18051dd92f9b985b57e4a4eacb833a SHA-1: cffd3ecc108c9fa248ebcb5d5f62b07951aaa1be SHA-256: 32be6db06fef80c3bc14d3a6bbca03ac7600752b092e1ca950a7bb8b4320628c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks and free item generators for popular games like Roblox and Minecraft. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs are indicative of a phishing or scam campaign designed to lead users to potentially harmful content or further malware downloads. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a lure for initial access.

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-free-vip-servers-mad-city-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/hack-money-in-game-synapse-x-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-knives_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/hack-for-roblox-jailbreak-downloads_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-stuff-in-catalog-roblox-2021-nick_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/synapse-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/point-prizes-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-accounts-with-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/como-hackear-los-robux-de-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/funny-free-roblox-t-shirt_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-hack-back-a-roblox-accunt_GM431946152.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_off00002f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F67 22244 bytes
SHA-256: 23456b26431e97e0c06ea46716a64d4c674d34556548a06f3d89d0c17c175394
font_01_sfnt_off000060db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 19660 bytes
SHA-256: 848a249995fc3b15ba5334a34221e78cdbc3852d286582dd33d15cfb6de1c063