Malicious PDF — malware analysis report

Static analysis result for SHA-256 255566161ed85d4b…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 08:33:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5a052d17338f868f87df4264c4ca6882 SHA-1: 35eb476faceb74ed0c858a7d16ed722e0c781488 SHA-256: 255566161ed85d4b04794c968880238774f04a9674d0f4f8a94ba199e0508c1a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to external websites, including one that advertises a 'robux download game hack'. The ML classifier strongly indicates maliciousness, and the presence of game-related lures suggests a social engineering tactic to trick users into downloading potentially malicious content. The document body, though heavily obfuscated, contains URLs that are consistent with the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://netcdn.online/app/431946152/robux-download-game-hack PDF link annotation
    • http://183.91.70.11/repository/free-minecraft-videos_GM479516143.pdfPDF link annotation
    • http://183.91.70.11/repository/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://183.91.70.11/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://183.91.70.11/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://183.91.70.11/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/minecraft-windows-10-key-free_GM479516143.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_off00004db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB3 26072 bytes
SHA-256: 97dfc3ac66693c495ea73fea02617e47fee222d762ecfc1ec7e2ad1ec68eb0bb
font_01_sfnt_off000089a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A1 18656 bytes
SHA-256: 643f530bc401710360b2f74e2e590a7f6ab15445ebda3165faa7e078ea1fa698

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