Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd18e342344ebf9…

MALICIOUS

PDF

77.3 KB Created: 2021-07-19 01:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43bfb66d90843195f5c7233a471a8bfd SHA-1: 553183be3d4ee9acce77253b335ce7231468f171 SHA-256: 5fd18e342344ebf9e57b82ed978cfeff2a0b98e7fc5a8c690958975140c373b1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains an embedded URL that likely serves as a lure to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a potentially harmful external resource, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/iXsW93xxTQA/square?utm_term=singer+191d300aa+industrial+sewing+machine+manual
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8bd13f311dc752b09c77c/1625865491166/zovivabimiriwu.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee4e9d0981f36585a34677/1626230429959/78637251926.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f4a52d0b174908921cc2c4/1626645805743/gerabubavuwedejefivexim.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee80ee588fb566951841f6/1626243310710/computer_parts_vocabulary_matching_worksheet.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_off0000cb08.bin
312320595e7a6886c244556f6388caaac5ddc52d3cd1bb4327712234816bf708		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB08 11472 bytes
font_01_sfnt_off0000e5dc.bin
1b2e06b80871ddc5163b51adf25b9d6dc2ccd8ad3ff67d077ef979994b5370f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DC 16648 bytes
font_02_sfnt_off0001111d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1111D 16792 bytes

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