Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd98517807ce506…

MALICIOUS

PDF

43.6 KB Created: 2021-05-14 13:31:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 405f3ce7b32098637ba3c6bd91aa5098 SHA-1: 4ec5319faf7ba61cbaf3fd0dc1de6a6a5a95ab35 SHA-256: cbd98517807ce506a8e36eb5433b36b7b8082a9454b00f6784d170f3bc9eb2a3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it links to external URLs, specifically a 'free generator / game hack' lure. The document body and extracted URLs reinforce this, pointing to sites offering game cheats and free currency. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the overall structure suggests a phishing or scam attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/minecraft-coins-free-game-hack PDF link annotation
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/free-robux-on-ipad_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_003_off00004e50.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E50 26016 bytes
SHA-256: 219f6f48963baf11ddcc0cf15becd90ff105733953ea1cb1b439c8d7809b7114
font_01_sfnt_off00008a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A27 17712 bytes
SHA-256: f11cf7a31a005d7bc14b9508c64b9243aa3fd98d87a18c3c2fdef7c62eb0ce9c

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