Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5944bbc2e1d8dad…

MALICIOUS

PDF

37.7 KB Created: 2021-05-22 23:48:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1cd0d608dc943433097a9a03afd3ad05 SHA-1: 422b5d2f68eb630534fad7da1bb4cd3f78dffecc SHA-256: b5944bbc2e1d8daddcda4a05d4a4275062f823051b0e7217d00ba33654343cf7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent call-to-action related to 'Coin Master Free Spins App' and 'Coin Master Generator'. These lures are designed to trick users into clicking the links, which lead to external sites like 'netcdn.xyz' and 'photographygroupofbunbury.com', likely serving as landing pages for scams or further malware distribution. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

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/406889139/coin-master-free-spins-app-game-hack PDF link annotation
    • https://photographygroupofbunbury.com/images/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003138.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3138 24372 bytes
SHA-256: 3480c7906c3da12aa56523d5ac1d4cba56d4ab057c957de78fefed81e249bca1
font_01_sfnt_off00006928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6928 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000072d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D9 17884 bytes
SHA-256: 21af4872a04c62c178ac31651a333ecdcea5bb1ed4ceeeef1956d42e8fc37ea8

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