Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab553a2943f73540…

MALICIOUS

PDF

34.8 KB Created: 2021-06-21 11:12:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2fdc9391c7a442e270591be5972af62b SHA-1: fb059749497d3b9f1088b5ce102184b643cabbff SHA-256: ab553a2943f73540e82f1d66e0fbb04a670e625654159523b5d5da8d4a3de66c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one pointing to 'http://netcdn.co/app/431946152/free-robux-codes-2021-live-game-hack', which is identified as a lure for game hacks. The presence of multiple similar URLs suggests a campaign to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

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-codes-2021-live-game-hack PDF link annotation
    • http://zercalo.org/images/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://zercalo.org/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-roblox-card-pins-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/get-follower-tiktok-free_GM835599320.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-multiplayer-free_GM479516143.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_off00002eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFF 22540 bytes
SHA-256: 0ae472bb5c96a854a3ed64968ca3278671f2f28bda943680f351469d8ac9f2cd
font_01_sfnt_off00006167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6167 19528 bytes
SHA-256: a5ed3f87501cf43636b6c933a6733c2494408900e830f957c1c96c0796137d95

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