Malicious PDF — malware analysis report

Static analysis result for SHA-256 86479887d807ca4e…

MALICIOUS

PDF

33.8 KB Created: 2021-07-20 03:13:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f00a1c8abb1fbeb12347fcd73247feef SHA-1: 70b1ff0fe4ada39c7e7a87223228138caab35418 SHA-256: 86479887d807ca4e76f5a83b8bd0f082a5a4ba715cddaf848ca536b343135efc
82 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free game hacks' and directs users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs indicates an attempt to redirect the user to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interest in freebies to lead them to a malicious resource, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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.tw/app/835599320/tiktok-free-views-game-hack PDF link annotation
    • https://www.manmed.info:443/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-link_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_off00002fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE2 22928 bytes
SHA-256: 664d72831de51faf0921367ef5304dcda4c4864c454c8a4bb8478554f05e2ecd
font_01_sfnt_off00006390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6390 17752 bytes
SHA-256: c0458c8281c5f614ec80a73af60f82da894f7f0cb4b38fcd4688d4eb1216e853

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