Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d53c1f2aeb2ed81…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 14:46:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1f0d37b1e87dc1a2d229eb27077e19a2 SHA-1: 0997535cc19d67642e9164d21a9585e3c574535a SHA-256: 6d53c1f2aeb2ed815951807db029d279dcb07d1db19042260bc676d3908bc596
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a lure for free game items, specifically 'Free Spins For Coin Master', and contains an embedded URL pointing to a potential download. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests that the document may be instructing the user to decrypt a payload, which is a common tactic for bypassing security filters. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://netcdn.tw/app/406889139/free-spins-for-coin-master-ios-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/creator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-catalog-items-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-gift-card-codes-not-used-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/piano-keybard-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-hacks-unknowncheats_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-hats-and-gear-on-roblox_GM431946152.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
font_00_sfnt_off000030fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FA 22668 bytes
SHA-256: 9a5be60c831ea6945d9b448f1eb117c32ec9b877d508e62208d247d1c37c755b
font_01_sfnt_off000063ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CE 18176 bytes
SHA-256: a5a25b2a03d060ab334b2318d32d1d5929522fb18c09f7a175bdb421134f7343

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