Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd21413aa0c55cc…

MALICIOUS

PDF

44.4 KB Created: 2021-06-04 04:03:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fad0872d0200f259dd4bc9780099dfdb SHA-1: d5e10db67dde5b8b33960f4c30c0b3037c55194b SHA-256: ddd21413aa0c55ccc85cbc62a9d8ca9c6f7dace263cb072e5ed95b3c9330ad25
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a seed-phrase/secret-recovery lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/406889139/free-coin-master-spins-daily-game-hack PDF link annotation
    • https://opac.itp.ac.id/repository/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/pubg-uc-on-discount_GM1330123889.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-2021_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_off00005114.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5114 25396 bytes
SHA-256: 44ea0282e40e61127de6f33a131bdc383bc2f1c5c0000545b94b12d307ea459c
font_01_sfnt_off00008ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB1 18308 bytes
SHA-256: 55b350ba652cc81c58cde26cd3be3a49d0b7ceb69ba015e6646fbbf561effc1c

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