Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ecb136cf79f17cb…

MALICIOUS

PDF

52.7 KB Created: 2021-05-15 11:33:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 21f3dea7a9832ae71c53ced4efa076fb SHA-1: 5e2d57a81f845690fa3f74e5314df185bad7491c SHA-256: 3ecb136cf79f17cbf07e3b3f34436640d70ebdfac5fc60488516f837d489b116
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and a visual download button lure, indicating an attempt to redirect the user to a malicious site. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains references to 'robux' and 'free game hack', suggesting a scam or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9324

Heuristics 4

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/431946152/www-roblox-com-robux-free-game-hack PDF link annotation
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/free-roebucks-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F59 36868 bytes
SHA-256: 3da93349cc4da4c4c790cca45f8943400227878f52f8f3ad3ab87921e3435ebc
font_01_sfnt_off0000a136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA136 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off0000aad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD6 18708 bytes
SHA-256: c91f27fd30ec200e2a0dbd5cc88ad35776bc2371b1b59549651737de5f7a4295

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