Malicious PDF — malware analysis report

Static analysis result for SHA-256 efb4d5d8745dd05c…

MALICIOUS

PDF

43.0 KB Created: 2021-05-14 22:49:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 919b816cae3a13ef4f3ebd0024c81494 SHA-1: e6eb53a2646d3e853827aafb6cb406cddb10691b SHA-256: efb4d5d8745dd05c6e8e7890effa184807f68b4f369847651a7d1fbb30e4b2d1
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links to known malicious redirector infrastructure, specifically pointing to a Minecraft hacked client download. The document body and heuristics indicate a lure to download a malicious file, likely a game cheat or hack, which is a common social engineering tactic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-1.8-9-hacked-client-game-hack In PDF document text
    • https://newenglandafs.com/images/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/get-robux_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/facebook-coin-master_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/hack-version-of-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_off00004b4d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B4D 25676 bytes
SHA-256: c4194164137a650d706f14d28ba08720386ffee4db7d4924626c7b42ab594f11
font_01_sfnt_off0000852f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852F 18532 bytes
SHA-256: 397fe146c4cb21b8fa0568cb6b824f44c66529b57f9939d7b0b2fcb40fe95c7f