Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15d819057e5ebe9…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 09:22:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7049702c29f7ce8ba72b2dd7de89e417 SHA-1: c724fe05563bfc3b84fcdbaffc13fc83b7290579 SHA-256: a15d819057e5ebe964cb0aab4de146f0b6c54058f0a40ba918307ef3f5a67ee8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The ML classifier strongly indicated maliciousness, and the document body, though garbled, contains references to these lures and URLs. The primary attack pattern involves luring users to malicious sites via deceptive content, likely as a precursor to further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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 https://netcdn.online/app/431946152/free-robux-codes-2021-game-hack In PDF document text
    • http://www.atlanticexportsltd.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://www.atlanticexportsltd.com/uploaded_files/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.atlanticexportsltd.com/uploaded_files/userfiles/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.atlanticexportsltd.com/uploaded_files/userfiles/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://www.atlanticexportsltd.com/uploaded_files/userfiles/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/tik-tok-free-fire-30-detik_GM835599320.pdfIn PDF document text
    • http://www.atlanticexportsltd.com/uploaded_files/userfiles/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://www.atlanticexportsltd.com/uploaded_files/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://atlanticexportsltd.com/uploaded_files/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A86 29372 bytes
SHA-256: 2def450b4555bbb9cf0462f531f7d78d10a56f0089726159aebaf9b7709e5803
font_01_sfnt_off00008b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B31 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000094e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E0 18588 bytes
SHA-256: 0c0011b59677f21f59199ad7d2a82948105ed154610022cedcbab6f052c91d55

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