Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6363afce53979d3…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 23:37:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 02cf0f83e29f634019a71614954da253 SHA-1: 778d711438d7c93825cb8623690cc94c47f1c508 SHA-256: a6363afce53979d32f69cdcd125af55d678714cc6e7a2479859981ab685e2c7d
62 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a prominent external URI pointing to a download site, likely intended to trick the user into downloading a malicious file. The presence of a 'download button' heuristic and the ML classifier's high confidence score further support a malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.online/app/479516143/minecraft-skins-download-free-game-hack PDF link annotation
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/minecraft-items_GM479516143.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-roblox_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/pubg-uc-global_GM1330123889.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-roblox-dominus_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
stream_004_off000056dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56DD 25760 bytes
SHA-256: 8c82176aca8fc763ca6744eb83c00b63b221ed9c6a19fcd0fdb3ab42174d7a49
font_01_sfnt_off00009102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9102 18460 bytes
SHA-256: 54d3aeb7b3beebea3cfa48561b043312cf5d8c01a954df644a6f0691dd3f9e10

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