Malicious PDF — malware analysis report

Static analysis result for SHA-256 7125a5fb90aaf69c…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 09:29:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fa94b56a011dfb07936ba4ff61368e5a SHA-1: a97579ba0993b84002b994b513271a0651315090 SHA-256: 7125a5fb90aaf69c37f49a80dc03872982927e911cd5f76c786532c3adb29035
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary redirector identified as 'https://netcdn.online/app/431946152/free-robux-no-human-verification-game-hack'. This URL, along with others, is part of a lure to obtain free game currency, likely leading to a phishing or malware download site. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/free-robux-no-human-verification-game-hack PDF link annotation
    • https://www.alarqam.ae/userfiles/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/rewardex-robux_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-com-www_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-hack-ios-download_GM406889139.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_004_off0000510a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510A 24832 bytes
SHA-256: 8bf11cebdfcb05190b4ec7c5fea0f8ff4b41bb6a783be63c58de43759023cc83
font_01_sfnt_off00008a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6F 18860 bytes
SHA-256: 7bf6b254896799c3550cbaf8339a45bd8c79022df116fd793fc899e49cde55bc