Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1da0ed822cbb666…

MALICIOUS

PDF

37.5 KB Created: 2021-05-24 01:09:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ba6c7d03a6136c8aa64c29b68395c41f SHA-1: c06b3b24df00f3a083b3453d6ccdca8ea55d87a6 SHA-256: b1da0ed822cbb6665ba4ac1969d0d1109491abf52e0edc012bc5f687f7cf1224
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9447

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/roblox-fun-com-free-robux-game-hack PDF link annotation
    • http://www.habitas.it/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.habitas.it/images/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://www.habitas.it/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://www.habitas.it/images/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://www.habitas.it/images/huskybuscom-free-robux_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
stream_002_off000035f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35F8 25592 bytes
SHA-256: 1c38b1ce67257783a39d9bcc274e732c34c45352b87750b5ef084e4bb7b07d88
font_01_sfnt_off0000716b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716B 18348 bytes
SHA-256: 9560f0e6f9a4e6be006083e3696e79311a38bb173f302534750988b281bae61f

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