Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d23d814dbcb3b7…

MALICIOUS

PDF

37.2 KB Created: 2021-05-30 13:16:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1e0c35a8b22d44be69d78e1965f0edb0 SHA-1: c9d70aa96c82b5576cf52d81382df4ed7031b565 SHA-256: 92d23d814dbcb3b726dcf0d8894e904348055bc828c22135e4fec49e8fcff96e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://netcdn.xyz/app/479516143/minecraft-skins-free-girl-game-hack PDF link annotation
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://caotangmen.org/wp-content/uploads/sites/17/fsqm-files/tiktok-follower-bot-free_GM835599320.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_off000037e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37E0 25544 bytes
SHA-256: 3a88963a30f2124c0ee0e9e79542d82d0f5829922655d85b4416859ad3eaf85d
font_01_sfnt_off00007176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7176 17812 bytes
SHA-256: 7ce5d1bffc067a7697c6659b9f16d2693dfb8cdcb2edfb00fbdf7ce9282af41c

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