Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6a32eaed58d4b0…

MALICIOUS

PDF

42.7 KB Created: 2021-05-12 03:30:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a41cfd77991efbeeb016d0622fc4db77 SHA-1: aadbe864e495d2a86b6e10e88b6923e869d6f8c4 SHA-256: fa6a32eaed58d4b0eba70131fe70f2eb3974a3d08851ede0c3db43145dab2d47
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-confidence machine learning flag and impersonates Microsoft to lure users with a "free download" link. The embedded URL points to a domain that is not associated with Microsoft, indicating a credential phishing attempt or a lure for potentially unwanted software. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/minecraft-pe-apk-free-download-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.xyz/app/479516143/minecraft-pe-apk-free-download-game-hack PDF link annotation
    • http://oceanos.pl/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://oceanos.pl/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://oceanos.pl/images/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://oceanos.pl/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://oceanos.pl/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://oceanos.pl/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://oceanos.pl/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://oceanos.pl/images/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://oceanos.pl/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://oceanos.pl/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://oceanos.pl/images/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://oceanos.pl/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://oceanos.pl/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://oceanos.pl/images/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://oceanos.pl/images/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://oceanos.pl/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://oceanos.pl/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://oceanos.pl/images/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://oceanos.pl/images/free-coins_GM406889139.pdfIn PDF document text
    • http://oceanos.pl/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://code.giftcards.comIn 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_003_off00004bc7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC7 24376 bytes
SHA-256: a2f1d8b0c31e0e27222c7547ba3a0524fc400ba26d707e326e6dfad14485f92c
font_01_sfnt_off0000831b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 18788 bytes
SHA-256: 56ecf13b7fdae58d5e4afb69efa7bdb7b8d9a7a0932eb3c661bed49813117ab2

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