Malicious PDF — malware analysis report

Static analysis result for SHA-256 18126ea81635716a…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 13:00:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 84d72020fe2f04363d6ecbcf08a481c5 SHA-1: 3f720bb2827dee72505828e83f411b00206091eb SHA-256: 18126ea81635716a5f75567592a3770b4ddbc1b8d17bcf428302af478ff3a7bd
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a QR-code 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 0.9980

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/431946152/free-robux-android-game-hack PDF link annotation
    • http://projectunionstreet.com/library/repository/hacks-for-free-robux-on-roblox-no-human-vertify_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/r-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/can-pokemon-go-free-evolution_GM1094591345.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-hack-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/pokemon-go-free-qr-code_GM1094591345.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-coin-master-spins-link-download_GM406889139.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
font_00_sfnt_off00002f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F36 22816 bytes
SHA-256: 0d37f1f60af97e00257ac0fb4b5573678535e7c1aea63e7b4acb687b1b6783b8
font_01_sfnt_off0000629c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629C 19012 bytes
SHA-256: 2e478fc7b9ce0e70b8625047eb87de3eba01de88a50ec98befc019c81419eab9

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