Malicious PDF — malware analysis report

Static analysis result for SHA-256 24529b1ce3077393…

MALICIOUS

PDF

35.6 KB Created: 2021-07-03 18:34:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8829e5c15393b1b3c3fec58f8e497f6e SHA-1: 1ae531953f47b18c4f1df73d8d10600793db6dc9 SHA-256: 24529b1ce307739340c3c675ad4d8bcc891c57bebcce9b99dee2ade7b9862a72
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 4

  • 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 http://netcdn.tw/app/406889139/coin-master-unlimited-coins-hack-apk-download-game-hack PDF link annotation
    • http://proyetec.com.co/aym_image/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-to-hack-heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/robux-hack-site_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-do-u-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-gift-card-roblox-giveaway-live-youtube-2021-june_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/roblox-hack-one-app-rewards_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-to-get-a-free-pet-in-roblox_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/wurst_GM479516143.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/guess-that-song-game-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/roblox-weapons-for-free_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
font_00_sfnt_off00003258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3258 22940 bytes
SHA-256: f60e42549a9e1b1c8cdf16315502ea631740b340e3b5bacd29c77c28c1680b7c
font_01_sfnt_off000065cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CB 19208 bytes
SHA-256: ac8a1cc94d9adebce7336fc1630e3f53360c4b0eb9ab9d36c6a158ed54cc7f68

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