Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b00938f12eb27a…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 22:57:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e715b054b4a396fec1fd4ab0bb57aaf5 SHA-1: 978712b607dab2c233e67367adbd0bf4decb6330 SHA-256: b1b00938f12eb27af666338394e263568a8e93de554449fd0c4d22d6442709c4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized and related to game cheats and free currency. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure further supports a malicious intent. The document likely serves as a lure to direct users to malicious sites that may host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.tw/app/431946152/free-robux-real-working-game-hack
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-minecraft-codes_GM479516143.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-hack-com_GM406889139.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-get-free-robux-real-no-human-verification_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/roblox-lumber-tycoon-2-spawn-hack_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/roblox-view-code-with-cheat-engine_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-robux-come_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/roblox-free-copy-place-service_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-gamepass-roblox-script-not-patched_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-get-free-clothes-roblox-2021_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-robux-on-pc_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/minecraft-that-you-can-play-for-free_GM479516143.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/hack-atravesar-paredes-roblox-2021-marzo_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-hack-review_GM406889139.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-get-free-robux-buy-inspecting_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-robux-that-actually-works_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-free-spins-8-14-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f0c.bin
8f99705808f3f6ba9880600f158a6d048cf312255050584e675efd0213eb15c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0C 21984 bytes
font_01_sfnt_off00005fa7.bin
9945ffa193253d154cbce2906461b0c2a302f27e13cc5dbaefc5af262476b8d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA7 19280 bytes

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