Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec57a406e2a0634…

MALICIOUS

PDF

43.9 KB Created: 2021-06-11 05:18:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ccdfd995a10420e9a1e0834e829b29c0 SHA-1: 1dbf3c5f7d1e859992f2e15d7d317b79694dcbe5 SHA-256: cec57a406e2a0634ce252ffdd607ff474616bd646fa3388ef46e965c07d27242
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 0.9865

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.tw/app/431946152/roblox-ways-to-get-robux-hacks-game-hack PDF link annotation
    • http://vedrachemicals.ro/images/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/cashrapps-free-roblox_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-get-free-stuff-from-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/hacks-for-ninjamaster20211-roblox_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/hack-roblox-account-kali_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-roebucks-com_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_004_off00005076.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5076 23956 bytes
SHA-256: 9d6b0599a249c7a5d98e6d4eef22c5c68a033a84b1dca6583dda5703e032d493
font_01_sfnt_off00008719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8719 18804 bytes
SHA-256: 74b1511a643c726dd007a63154b0dafb0bb7ccfa992bd2a64725e91c01aa4c32

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