Malicious PDF — malware analysis report

Static analysis result for SHA-256 824c88411564aa7f…

MALICIOUS

PDF

45.3 KB Created: 2021-05-17 08:53:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a4eb8a99dacfbfd5146472c9ae15fac4 SHA-1: 444ce31dd272bcd3778ab17391d6abc8d4776977 SHA-256: 824c88411564aa7fc4d4f76b990b622afbc201f1ea87938c6c75608a94483ba0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and embedded URIs that promise free game currency (Robux) and hacks for popular games like Roblox and Coin Master. These lures are designed to trick users into visiting malicious websites, as indicated by the 'PDF_GAME_HACK_REDIRECT_LURE' heuristic and the ML classifier flagging the PDF as malicious. The presence of both external URLs and an IP address literal suggests an attempt to redirect users to potentially harmful content or download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9777

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/roblox-promo-code-to-get-free-robux-game-hack PDF link annotation
    • http://foo.com.tw/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/i-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://192.168.0.99/%20%3Cp%3E%3Cp%3ERoblox%20Hack%20Free%20Robux%20Generator%20Online%20100%25%20Working%20Hello%20Roblox%20Lovers,%20Today%20in%20this%20Post%20i%20am%20show%20you%20how%20to%20get%20Free%20Robux%20Android%20,%20Ios%20and%20Others%20devices.This%20is%20not%20paid%20tools%20it%20is%20totally%20free%20and%20100%25%20working.%20Day%20by%20day%20this%20game%20is%20very%20popular%20now.There%20are%20many%20players%20use%20this%20tools.%3Cp%3E%3Cp%3ECamera%20Controls:%20W%20=%20Moves%20camera%20forward%20In PDF document text
    • http://192.168.0.99/%20%3Cp%3E%3Cp%3ERoblox%20Hack%20Free%20Robux%20Generator%20Online%20100%25%20Working%20Hello%20Roblox%20Lovers,%20Today%20in%20this%20Post%20i%20am%20show%20you%20how%20to%20get%20Free%20Robux%20Android%20,%20Ios%20and%20Others%20devices.This%20is%20not%20paid%20tools%20it%20is%20totally%20free%20and%20100%25%20working.%20Day%20by%20day%20this%20game%20is%20very%20popular%20now.There%20are%20many%20players%20use%20this%20tools.%3Cp%3E%3Cp%3ECamera%20Controls:%20W%20=%20MovesPDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000051b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B6 25600 bytes
SHA-256: 4f4238ca2cd06303e6d2b35ba9e8fa1631ff46401451db00b602b973eb5fb096
font_01_sfnt_off00008d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D39 18780 bytes
SHA-256: 57e6eef1fbc3af66d8c5b48d94799429ebee4b6256a60c8d2844d61f1a05fc0c

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