Malicious PDF — malware analysis report

Static analysis result for SHA-256 a920c723b09b9f8c…

MALICIOUS

PDF

33.0 KB Created: 2021-06-25 11:46:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6ed0b0b036937c5c9990822d3cfee2e7 SHA-1: 68c281da265f82ea461af45879c5b22ac8f3d8c3 SHA-256: a920c723b09b9f8c449757183c92e5ca490c7d086b2831fa5ed39d44425190d7
82 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'Robux Hack' and a fake download button, directing users to malicious URLs. The ML classifier strongly indicates maliciousness, and the embedded URLs suggest a phishing or scam attempt to trick users into downloading potentially harmful content. No scripts were extracted, but the PDF structure and linked URLs are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/robux-hack-android-game-hack PDF link annotation
    • http://karldall.dk/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/free-roblox-gift-card-number_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/omg-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/pokemon-go-free-kr-hack_GM1094591345.pdfIn PDF document text
    • http://karldall.dk/images/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://karldall.dk/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/roblox-veil-hack_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/free-chromebook-exclusive-roblox-item_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/free-robux-no-survey-no-download-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/free-roblox-noclip-exploit-2021_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/dog-roblox-free-costume-make_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000299e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x299E 22676 bytes
SHA-256: a4ed077f09d6062b5b7f393953383f66933366dbfb0e70fbef4c6994bdc978ab
font_01_sfnt_off00005c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C68 19016 bytes
SHA-256: 0cc4b9e3a8319b43acef2ba80a37278df77d91490c3d406238914a0965687b4d

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