Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5bd2c879e706d8d…

MALICIOUS

PDF

43.6 KB Created: 2021-05-17 06:39:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8fae52c50421ed2db8554dec1e2bee2d SHA-1: 42b451384a90a741762dc8ddde388b38a217d0d3 SHA-256: a5bd2c879e706d8de500b07e9f9203e779e60e08dbc22ac0a51a4f82806e1f98
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting free Robux and game hacks. The ML classifier also flagged this PDF as malicious. The presence of a download button lure further supports the malicious intent of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 3

  • 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.xyz/app/431946152/robuxlove-.net-free-robux-game-hack In PDF document text
    • http://ims-77.fr/images/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/infinite-robux_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-jackpot-madness-hack_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
font_00_sfnt_off000048fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48FD 27220 bytes
SHA-256: 8da6387b0217c755ee9a2fe45471943682740bd26875a32075c6f2a3c013e889
font_01_sfnt_off000087ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87AC 18372 bytes
SHA-256: 65db4e182113fd1a8aa6d8046ef53f92d54fa7b6a505b130f920b75136a01eb1