Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1c1170ed69198a…

MALICIOUS

PDF

32.8 KB Created: 2021-07-20 16:23:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 149a09fabf861abf1f8e8593eb55bbbd SHA-1: 6b9f4fd0c00cb73483f7b99c90589cc8a8ff51cb SHA-256: fb1c1170ed69198a07ded1f97cc0b45ecf61e3b06c584d9f909ac52802a81707
82 Risk Score

Malware Insights

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

This PDF document employs a common lure of 'free Robux' and 'game hacks' to entice users. It contains an embedded URI that redirects to a malicious website, likely to download a second-stage payload. The ML classifier strongly indicated maliciousness, and the PDF structure itself points to a lure-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/431946152/free-robux-giveaway-game-hack PDF link annotation
    • http://www.akvamaster.com.ua/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off00002af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF7 22132 bytes
SHA-256: 7107ae89e16636c0cae751050c7947e345745e835b6485c55d3437fb86334b05
font_01_sfnt_off00005bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDE 19004 bytes
SHA-256: 53c681b56d2aeec96b089841d9ffc48036577cfa01866e40d4f9479265023228

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