Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf25c8c62dad14cc…

MALICIOUS

PDF

44.4 KB Created: 2021-05-15 09:11:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f053ddde2de8849ccc91088de5f89d14 SHA-1: 50c3acbd3e39ed5d28e328ac8a331fde9f0bcf08 SHA-256: cf25c8c62dad14cc14b889fcdc2b74e5e45ac4449f67b05ab17e48f66c65a940
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for game hacks and a fake CAPTCHA, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the embedded URLs suggest a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a malicious redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/john-doe-roblox-hacker-game-hack PDF link annotation
    • http://www.salwangurgaon.com/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/minecraft-18-9-hacked-client_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_003_off00004a17.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A17 29076 bytes
SHA-256: b9a5e0067e4cd50a95963529480c7128509d53a303c53c6db3ec8dde3d3db630
font_01_sfnt_off00008a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A47 18680 bytes
SHA-256: fd443decf8178cd51ee717e0f89bd27a56480e9e0f5488a79ceaa3e76e017fae

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