Malicious PDF — malware analysis report

Static analysis result for SHA-256 036d800de01796c9…

MALICIOUS

PDF

75.0 KB Created: 2021-07-12 20:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0ff6b038f9f239e844292507e2de5fd SHA-1: 3605f475d6a5069ef95a334c16a46308535f7983 SHA-256: 036d800de01796c9568d43be083e0ba075a9651faf764b07d6af046a70d917fe
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains embedded URLs, one of which is a feedproxy URL that appears to be a lure for downloading software. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7746

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://feedproxy.google.com/~r/sq/ugae/~3/-7-cX3opz_8/square?utm_term=ms+word+2007+download+windows+10
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7b7a3afd06e4982e8b3e8/1625798563470/77144066801.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e90615c14ff043cd5bbf9a/1625884181283/83208064513.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8351a25441e1b37899fce/1625830682854/home_sheep_home_3_unblocked.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e898aec1e0ce526f757b84/1625856174789/hmrc_pay_your_self_assessment.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c719.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC719 16792 bytes
font_01_sfnt_off0000df2b.bin
ab13609c8774b4e67afcd3f540b7c5550456be5f9d265a0af0d5a8d6ee0240e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2B 15900 bytes
font_02_sfnt_off00010833.bin
ca9da0603848071f02d2ae21b5db6e9aed9b2fd52e84b44af684185ba28fd448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 10436 bytes

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