Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9732db31704ad4…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 21:37:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 13c9ff50b2b3dd8a4b8a71c5012ae937 SHA-1: 43303745f2874565195c8985939d95a733c161cc SHA-256: bb9732db31704ad42c7f5373179ab96e924940fd8915ea96beadb85afa43c9d5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/free-coin-coin-master-game-hack PDF link annotation
    • http://www.salwangurgaon.com/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-roblox-dances_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/robux-generator-hack-exe_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-make-a-free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/cch-ly-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/are-roblox-games-free_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_off00002f10.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F10 23220 bytes
SHA-256: 8fdb8780ca355232d2f6af71e6628dbd6ec0c6b02a965224bee2490616994b64
font_01_sfnt_off00006385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6385 17996 bytes
SHA-256: e3fb1ca426c01543f38f1d1129ae452bef28a40365fbe99abf1b239340e30419

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