Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3ec49f97e8d74b…

MALICIOUS

PDF

37.0 KB Created: 2021-07-03 20:38:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8513f1d0fec5b75faad1423f2db2e11e SHA-1: efad02925d084c659047dc52a192c31bb49df0c8 SHA-256: 0d3ec49f97e8d74b616b7530161b3b75bd24f378aa80798c53bbacd9ecf5500a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, including a prominent one pointing to a 'coin-master-online-hack-tool-game-hack'. This lure, combined with the ML classifier's high confidence, indicates a social engineering attempt to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it acts as a dropper or redirector for further malicious content, likely related to game exploits or scams.

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/406889139/coin-master-online-hack-tool-game-hack PDF link annotation
    • https://www.yatrikathmandusuite.com/userfiles/files/robux-earner_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/pokemon-go-free-promo-codes-2021_GM1094591345.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/roblox-g_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/app-master_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/easy-robux_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_002_off000039eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x39EB 23424 bytes
SHA-256: cae7806482c6573945aeb66a5a60876a2577b1d3a88d3e96c0151fc2c024ae72
font_01_sfnt_off00006ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF1 18080 bytes
SHA-256: e55d028ed43e44089d97b54b530531a466e653d2d57bed8153c7241ef5bfe6e5

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