Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22bae6720664c35…

MALICIOUS

PDF

33.3 KB Created: 2021-07-21 00:07:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7e55e8e0499e8513593c81dc66b55fc9 SHA-1: 4863ca07944981a179d0c399027d1115a253ec8d SHA-256: c22bae6720664c35834dfafda3676e15a1cd45b9521366eb92f51f5a70fac018
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 0.9942

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/406889139/free-coins-coin-master-game-hack PDF link annotation
    • https://www.biancolatte.it/wp-content/uploads/fsqm-files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.biancolatte.it/wp-content/uploads/fsqm-files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.biancolatte.it/wp-content/uploads/fsqm-files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.biancolatte.it/wp-content/uploads/fsqm-files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • https://www.biancolatte.it/wp-content/uploads/fsqm-files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://www.biancolatte.it/wp-content/uploads/fsqm-files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://www.biancolatte.it/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.biancolatte.it/wp-content/uploads/fsqm-files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.biancolatte.it/wp-content/uploads/fsqm-files/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • https://www.biancolatte.it/wp-content/uploads/fsqm-files/minecraft-free-computer-game_GM479516143.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
stream_002_off00002ecc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2ECC 22816 bytes
SHA-256: e15890adcc3d1b06c049815035e5a8b3d94e1b37ab38ae120ac2044c3ad7eb71
font_01_sfnt_off0000620b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620B 17712 bytes
SHA-256: fd51fa1b849cf95139b510f282bcd47e41e352499df1938c7ca947a320e7b070

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