Malicious PDF — malware analysis report

Static analysis result for SHA-256 8790449a16241399…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 11:02:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 43273587647457afb2d3d39798df8f1c SHA-1: eb97328675d64ad69832e12cbf69717c4732101a SHA-256: 8790449a162413998bd7502f9704892f6f68639b99f38f187c6bedf985919a13
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded URLs and a visual call-to-action, impersonating Microsoft to lure users into clicking a link for free game items. The primary malicious URL identified is https://netcdn.online/app/406889139/daily-free-spins-on-coin-master-game-hack. While no scripts were explicitly extracted, the ML classifier and brand impersonation heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/406889139/daily-free-spins-on-coin-master-game-hack.
  • 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.online/app/406889139/daily-free-spins-on-coin-master-game-hack PDF link annotation
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/minecraft-free-download_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B3 27084 bytes
SHA-256: 4e6aa1b519431cdc987d5025a010057794b13ab6043c29e6832c9cf36fda3853
font_01_sfnt_off00009036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9036 18308 bytes
SHA-256: 1bc93d0bdf7bcc9dde046a772a1d5e318036c000a48b0748ebe0e6d1e12db192

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