Malicious PDF — malware analysis report

Static analysis result for SHA-256 624a6a317ace458d…

MALICIOUS

PDF

35.7 KB Created: 2021-05-21 17:01:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b707ebd8f43fd4df48aa048e4739d8b3 SHA-1: abaedeb7fe0baef21a39650fb4271495576f08d0 SHA-256: 624a6a317ace458d7a41117ac958861ff4ce3a2e4b2854790a2ff92de0b3753f
102 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 0.9492

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/free-robux-place-game-hack PDF link annotation
    • http://1.179.208.67/ckfinder/userfiles/files/wahoo-gaming-co-free-robux_GM431946152.pdfPDF link annotation
    • http://1.179.208.67/ckfinder/userfiles/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/robux-hack-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
stream_002_off000031e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E9 24424 bytes
SHA-256: c877a03aad918d32d0eaab5c9a81e588a341be20e3d0dbab4a228c0c39ecdfb7
font_01_sfnt_off000069bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BD 18472 bytes
SHA-256: a8315d3de564ce67f995c8887965c7d9f34366905f839248eafe88b792a59691

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