Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f3bb7a8e215306…

MALICIOUS

PDF

34.3 KB Created: 2021-06-19 09:59:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4eaf579f406b2bab49c43c17b5c05f7f SHA-1: 0560c9426387576c2d07fb1198e489eec98afef8 SHA-256: 12f3bb7a8e21530653d17dbaee1d43d7e02637f88b070fa1caf2bb41a5f24b5b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, including one to a 'free generator / game hack' lure, and a large number of other PDF links that appear to be part of a link farm. The document body also contains a URL that promises free Robux, indicating a social engineering lure to drive traffic to potentially malicious sites. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.co/app/431946152/how-to-get-a-free-robux-to-subscribe-game-hack PDF link annotation
    • http://103.40.122.33/akasia/repository/classic-minecraft-net-hacks_GM479516143.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/i-want-to-break-free-roblox-music-video_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-robux-hack-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-generators-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/adopt-me-roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-make-anything-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/the-laughing-unicorn-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-cheat-for-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/money-cheats-for-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-cruise-ship-tyccon-albatros-free-script_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_off00002f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F11 22360 bytes
SHA-256: 1bcc17b10b3182a6046e9dcd7f4d1b68d759b32df8e6a14c4bb1a9946fe88ea8
font_01_sfnt_off000060ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CA 19104 bytes
SHA-256: 7f1b44ae40c2006718812355e0ec6b0d7331ec2260ecf13c459534c3fe487f38

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