Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf1205646de037d…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 17:16:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7f91d9a78f44e02457d192fc6e261016 SHA-1: ee9d81e9dc86b43801d12aac5969faf6c5acead3 SHA-256: 6cf1205646de037df7a7869f073429ccf81854f0da76ebe7d39d32dbd14c8b68
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a "free generator / game hack" which links to known malicious redirector infrastructure. The primary link identified is http://netcdn.tw/app/431946152/free-roblox-followers-generator-game-hack. This suggests a phishing or scam attempt designed to lead the user to a potentially harmful site.

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.tw/app/431946152/free-roblox-followers-generator-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-trolling-outfit-for-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/wurst-download_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-codes-generator-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/cheat-engine-bypass-roblox-2021_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_off00002ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE3 21908 bytes
SHA-256: c9fa436c1c41a52ac7d84a68a99bc4e3de7bd97b4c22585ca26e62904efe2992
font_01_sfnt_off00005f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F67 18920 bytes
SHA-256: a09d8cf0a559fa74e49e4b45e5aaff27024b971303022577c6bda523e712508e