Malicious PDF — malware analysis report

Static analysis result for SHA-256 4111608695cd81a5…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 12:34:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ab87161272e14b3e877cb1f2772353ef SHA-1: 8ecbd741616c4531400265c80e791fea356ad235 SHA-256: 4111608695cd81a5022b381922d7ca8dbb633f41fc3e86cccd5da3afb0921bee
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/479516143/how-to-get-minecraft-coins-for-free-game-hack PDF link annotation
    • http://projectunionstreet.com/library/repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/cheat-files-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/hacks-for-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-cheat-on-roblox-giant-dance-off_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-cheat-in-roblox-jailbreak-speed-hack_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/websites-that-give-you-free-robux_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/coin-master-free-spin-daily-link_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_off0000334b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x334B 23364 bytes
SHA-256: 5bb946b114c53a27ea2faca16c4139cb910e50cb6d66e9e437a386a89208fee4
font_01_sfnt_off00006799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6799 18164 bytes
SHA-256: 08cfef77cd0745aa004e30d27b19be38b0f906a11dfdef7a7ac194d78643726e

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