Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a79a90fed4cbda…

MALICIOUS

PDF

42.6 KB Created: 2021-05-13 14:09:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6165309a0d44ce0f54a0e3ec78d5da35 SHA-1: 8cdbafc96d232dcac8aafa4f8ab23973ad2989c1 SHA-256: a6a79a90fed4cbda3c0e62a817f018c2a2618d049d0e77e0a7d8bb5dd16207f4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'free game hacks' and 'free Robux', directing users to the malicious URL https://netcdn.xyz/app/431946152/free-bobux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attempt, likely intended to deliver a secondary payload or lead to a credential harvesting page. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/free-bobux-game-hack PDF link annotation
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/wurst-mc_GM479516143.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/instant-robux_GM431946152.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://www.soil2soul.ae/uploaded_files/userfiles/files/free-spins-for-coin-master_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_003_off00004b8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B8F 25032 bytes
SHA-256: 6485456c48324b6ab7956bc9676a5cb7c4a773c079e128cee77dbad7e9f35ecb
font_01_sfnt_off000084ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84EF 18012 bytes
SHA-256: 21a070aee0b4453f2f1d9cb5d53691f71c1a468eb04f2ae46e30da6bacbd91e9