Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0adb769263d5198…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 10:55:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e74510b38ec64914f9a3e84afb5464fd SHA-1: 6fbc72a231778dd98d1fc7c184bbee4ce631d6a5 SHA-256: a0adb769263d519835ff37df54df71ded2cc5fbe96c608b60e71989359892309
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and sites offering game hacks, indicating a phishing or malware distribution attempt. The presence of a download button lure reinforces this. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/coin-master-hack-fast-org-game-hack In PDF document text
    • http://empresa-venta.hr/files/roblox-world-free-to-use_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/hacks-for-roblox-rubux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/cute-roblox-clothes-free_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/code-for-generate-free-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/robuxian-com-free-robux-code_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-phantom-forces-cr-cheat-engine_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
stream_002_off00003209.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3209 23408 bytes
SHA-256: 5c28cc77860b01b3eeadb3fbdf83a14eaac32ff68813f800d562de7a2fbe848d
font_01_sfnt_off000066ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66EF 18168 bytes
SHA-256: d952a74c9cb72cc49f5b54a2c88c13b6a4cd962dd0b14b2950186c215f4630d9

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