Malicious PDF — malware analysis report

Static analysis result for SHA-256 b508b517de1483d6…

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 22:10:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 81c26d6bab3ab82e70342db6535c6c30 SHA-1: 85e8996b139dfe2401e77e7f6ba341c4456196aa SHA-256: b508b517de1483d6e6a8eb62bbd409b000d2d43301ec9577a9474aea5432c25c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and similar lures. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the heuristic firings indicate a phishing or social engineering attempt to redirect users to potentially harmful content.

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/outfit-roblox-free-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-hack-roblox-accounts-pc_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-script-executor-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pastebin-raw-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-codes-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-too-hack-a-roblox-account_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-cheat-engine-the-streets_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/noclip-hack-roblox-jailbreak-may2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/2021-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-hack-roblox-windows-7_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-download-roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-cheat-money-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-1-million-robux-new_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/1-000-subscriber-roblox-hack-tool_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_off00002fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE9 22448 bytes
SHA-256: d84dfdb41ac943875f842ac6293e39561f04a3f2e595cab3ed8518ce166e8411
font_01_sfnt_off000061c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C5 18828 bytes
SHA-256: 91a88d64f7f548f399c039f814e8314ef016ad07e229ea2f74b477d385d0af9b

Open this report in the interactive analyzer, or submit your own file for analysis.