Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97c75432eea2af5…

MALICIOUS

PDF

46.1 KB Created: 2021-06-11 02:42:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 476c2a48bcf2df8f4929e9a3d4d82e17 SHA-1: 72b86dd3a96f43511e4676b862a449f1ee08c122 SHA-256: d97c75432eea2af5c375126187c36b99e52429b3194f4fafb937f34a7e95b770
140 Risk Score

Malware Insights

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

This PDF document contains a malicious redirector link that impersonates 'Paypal' and directs users to a site related to 'roblox hacks'. The ML classifier also flagged this PDF as malicious. The presence of a download button lure further supports the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.tw/app/431946152/https-www.roblox.com-games-202120216-galaxy-hacks-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
  • 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/https-www.roblox.com-games-202120216-galaxy-hacks-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/telecharger-ded-robux-free_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/dbzfs-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-break-free_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-mechacubes-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-33-hack-version-download_GM406889139.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_off00005039.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5039 27072 bytes
SHA-256: 4ae271ffacafa8ec1745e4a9277e25bbb031948908c6257d0bd67dfbd6d05149
font_01_sfnt_off00008c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C76 19900 bytes
SHA-256: e79d3e90b2841e26ec142d64319f5b7d1a9e748927af87ada4c7d58d6b84cd59

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