Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b587833dfcaa863…

MALICIOUS

PDF

33.7 KB Created: 2021-07-10 01:35:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 38fdeea1ab6846c7eac69c910bd23b9e SHA-1: 9087e44125eed4c532b0138e386ec0a6b64421e3 SHA-256: 1b587833dfcaa8639e8957445b7ca54387e9aa6818605a9839208d4614ba589a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to websites offering 'free Robux' or 'Coin Master' hacks, a common lure for malicious content. The ML classifier strongly indicated maliciousness, and the presence of these lures suggests the document is designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded links point towards a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-hack-no-verification-game-hack PDF link annotation
    • https://and.co.id/assets/CKImages/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://and.co.id/assets/CKImages/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • 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
font_00_sfnt_off00002d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D81 21980 bytes
SHA-256: 143f2ed3f11043ff4870faabdad3fdc0bd9038388d69945d800a0315cf242091
font_01_sfnt_off00005de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE9 19244 bytes
SHA-256: 96540bd7c84d60e769713d590412c745bf113fce47b0f54684cca50d2dde6ca8

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