Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a5395be986652e…

MALICIOUS

PDF

45.2 KB Created: 2021-05-15 04:01:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c638a7407860cfa660474a79c172ca02 SHA-1: 9d60a0d0ebba8f146e3f7df494d51d7e15717162 SHA-256: 91a5395be986652ee6f99314da226721a1e720d6a2ac8ad1ff6155e8854722c6
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 0.9621

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-hack-free-spins-game-hack PDF link annotation
    • http://kontaktadig.se/images/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/claim-roblox_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/get-free-robux_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47CC 25772 bytes
SHA-256: 38f2f144ec5aee6c7377815fd5507ed11cfa0a47e0422a5031a30de3a6dc0336
font_01_sfnt_off000083cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CF 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF8 18056 bytes
SHA-256: 12d79a7ddbb75c7a0854102822057d5441bee2ca4a20c79f8211a3d0b9a1f375

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