Malicious PDF — malware analysis report

Static analysis result for SHA-256 c01af27d1f19915a…

MALICIOUS

PDF

47.1 KB Created: 2021-05-11 16:32:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 757170a48c8e3e2dc1bfb8108a5e17c6 SHA-1: 54cf253d74f2499587dd52039ad71017507beb98 SHA-256: c01af27d1f19915a1396944304386456e7e0ee745b6c19b34985ea18a4a35951
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or verification prompt to deceive users into interacting with malicious content. It contains an embedded URI pointing to a URL that likely serves as a lure for downloading a second-stage payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • 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
  • 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/hacks-to-get-free-robux-game-hack PDF link annotation
    • http://library.umuslim.ac.id//repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/i-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-apk_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/hack-coins-in-coin-master_GM406889139.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_off000048a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A5 25264 bytes
SHA-256: 8e7860acb89484811a1dab3a056cf9a938be2285a3fb9c48811164a737db89bf
font_01_sfnt_off0000835d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835D 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_02_sfnt_off000094ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94CE 18516 bytes
SHA-256: 49067203d4eb86d04ddf999d64ba4750afe8b15cea6fed862c5ee30987f881c1

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