Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf7abae72fdcc7e…

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 18:47:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 52c936b55444a2d83478559f6fbee7cf SHA-1: 551406d2cf0da22a9eef8309dcaab3f8ca954f97 SHA-256: 1cf7abae72fdcc7e317d755097cfcfe58d524bb76e26d953a29883f3b18ccbc0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' lure. The document body, though malformed, contains text related to hacking Roblox and a URL that aligns with this lure. The embedded URLs suggest a redirection to potentially malicious sites or further malicious documents, likely serving as a downloader or redirector for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/how-do-you-hack-roblox-game-hack PDF link annotation
    • http://krumerhaus.at/images/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-website_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/add-robux_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.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_003_off00004973.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4973 24956 bytes
SHA-256: 2d2affb70a44cd8bdd0566241ff7201e8c0fcbe3475c377362295f702d8247a3
font_01_sfnt_off000082d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D1 18816 bytes
SHA-256: d27b94fe1a8c05d6feb56d9a091a96145976f0feb7173cb46f16c8470fe3a7d8

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