Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb978f5be66684a…

MALICIOUS

PDF

250.5 KB Created: 2021-07-06 13:22:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b45c0f001962dd00ca1c23794e5f94e8 SHA-1: 1659e18813c359beeb0eb5fdd97e78ca7d29bc4a SHA-256: 8cb978f5be66684af3251c75802cb2f8120d1c7b745f06ad6730d8c5ae413869
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF that uses multiple lures, including a fake CAPTCHA and urgency prompts, to trick the user into interacting with a malicious link. The presence of MFA lure heuristics suggests an attempt to harvest one-time codes. The primary URL points to a game hack, aligning with advance-fee scam lures.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 7

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/1330123889/pubg-uc-180-game-hack
    • http://slims.abulyatama.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://slims.abulyatama.ac.id/repository/roblox-free-items-in-catalog-2021_GM431946152.pdf
    • http://slims.abulyatama.ac.id//repository/free-robux-promo-codes-2021_GM431946152.pdf
    • http://slims.abulyatama.ac.id/repository/goku-ui-free-roblox_GM431946152.pdf
    • http://slims.abulyatama.ac.id/repository/basketball-free-charactes-in-roblox_GM431946152.pdf
    • http://slims.abulyatama.ac.id//repository/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://slims.abulyatama.ac.id/repository/coin-master-card-link-free_GM406889139.pdf
    • http://slims.abulyatama.ac.id/repository/optifine-mcpe_GM479516143.pdf
    • http://slims.abulyatama.ac.id/repository/how-to-get-a-free-home-on-roblox-on-rocitixens_GM431946152.pdf
    • http://slims.abulyatama.ac.id//repository/minecraft-skins-download-free_GM479516143.pdf
    • http://slims.abulyatama.ac.id/repository/buxblast-com-robux-cheats_GM431946152.pdf
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdf
    • http://slims.abulyatama.ac.id//repository/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://slims.abulyatama.ac.id//repository/blogger-coin-master-free-spins_GM406889139.pdf
    • http://slims.abulyatama.ac.id//repository/roblox-comcom_GM431946152.pdf
    • http://slims.abulyatama.ac.id/repository/how-to-downgrade-minecraft-pe_GM479516143.pdf
    • http://slims.abulyatama.ac.id/repository/roblox-powering-imagination-roblox-hack_GM431946152.pdf
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spin-link-list_GM406889139.pdf
    • http://slims.abulyatama.ac.id//repository/how-can-you-get-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037c81.bin
95515338ea7aa72d42f9352df2e36870b9c015caf590fe27af0acb97d306346a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37C81 26180 bytes
font_01_sfnt_off0003b9eb.bin
84c3081e6b2a4483c93835978ec14d5fb9dc46fb8e36714ea66980acfa4789e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x3B9EB 18616 bytes