Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6fa1f8b42f80e1…

MALICIOUS

PDF

76.5 KB Created: 2021-07-13 06:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0594ede7ab6a8dd6e6d2423b05a2e63 SHA-1: 523f78d9c6de4b4109d415ce7d40c1db80f8c6c7 SHA-256: bc6fa1f8b42f80e159143e59fa60422d7fc8606e4673073d8d8f78cc5a0e5e21
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7287

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/razvivatel/yapz/~3/pL_UGxDroB4/square?utm_term=bad+smell+in+stool
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e81084ed7e630439665722/1625821316190/migezave.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8ee4e4ca3800a118888f/1626115812723/54909508235.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e869f379e5ad2408b2572f/1625844211628/paper_towns_page_count.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_off0000cbb0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB0 16792 bytes
font_01_sfnt_off0000e3c2.bin
0e504ff6f759a30ec5b4551f4d412175f5e001abc3da23b1e63844b4fffd7f86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C2 16208 bytes
font_02_sfnt_off00010d9f.bin
b64b6d3a0e3b23dd9c06ab9600eb3db58fb45b0479fa14ea2fceec83bb2269b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9F 10360 bytes

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