Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56bb924131fa7a4…

MALICIOUS

PDF

35.4 KB Created: 2021-06-29 19:21:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3c075731eff51c1e24406aa16c536a87 SHA-1: d0fa753187c1a05a5c2546740aa0f76835f93f14 SHA-256: c56bb924131fa7a44336ac068a91c832fdf2804e65e71868301d11ef0f759d9d
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.co/app/431946152/free-robux-gift-card-codes-2021-november-game-hack PDF link annotation
    • http://proyetec.com.co/aym_image/files/robux-free-co_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-robux-generator-no-human-verification-100_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/roblox-hacked-warning_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-to-get-free-robux-on-a-tablet_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-gucci-jacket-roblox_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-ways-to-get-robux_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_off000030ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EE 22492 bytes
SHA-256: 477af80322dd73ddd732bc0253560bbafce3bf745f45e846bb707d7d2f1e5e8a
font_01_sfnt_off000062cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CD 19892 bytes
SHA-256: cad56aca5b849020965c804dede64da57b50cdd01c430033cad15bb3c815175d

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