Malicious PDF — malware analysis report

Static analysis result for SHA-256 361d6880891c2903…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 10:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 73513efb9028858d6df97de864424520 SHA-1: 8b2a67d0becd2fb6c22b84f6190b844e3932c5b6 SHA-256: 361d6880891c290359842b24badecf432b0080682a46b198defb85c4beb1ca38
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains embedded URLs and lures users with brand impersonation (Facebook) to click on links related to free game items or currency. The primary malicious URL, https://netcdn.online/app/431946152/free-roblox-boy-clothes-game-hack, likely leads to credential harvesting or a malware download. No scripts were extracted, but the presence of multiple malicious URLs and the ML classifier's high confidence indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/free-roblox-boy-clothes-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/431946152/free-roblox-boy-clothes-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/pubg-8-uc-buy_GM1330123889.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-accounts-2021-with-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005157.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5157 24920 bytes
SHA-256: e73ba4b7bcc08498a92fa2defd356066cba650a26022699b1284c2e073babb1a
font_01_sfnt_off00008ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD1 18400 bytes
SHA-256: 69a74eaf458fe2a3fb9edb14aa49cbf22541198570b9a2743b15f982a07fada6

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