Malicious PDF — malware analysis report

Static analysis result for SHA-256 b18f981c24462a7c…

MALICIOUS

PDF

74.6 KB Created: 2021-07-14 00:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9486d8497c3f5d76be25e79178694ec8 SHA-1: 866c4e7b86a3efab1935b31f0828c7ccf16c310e SHA-256: b18f981c24462a7c03b359dafccfc1f1fa143ca6c03f6ab17e9674912e3111a8
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV with a signature indicating it is a phishing trojan. It contains embedded URLs, suggesting a phishing attempt to lure users to external sites. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier clean score 0.2402

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/gPkW7oTCsL0/square?utm_term=daily+oil+production+worldwide
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca896e0784948549bf862/1626122391052/97318922924.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed90c639532c3941c27ce5/1626181830978/noriwuzibavazer.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_off0000c094.bin
bd707723d4465adc9bf14ccb0df9511d38d40799d877e2160f440e0cbc5f52f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC094 10640 bytes
font_01_sfnt_off0000d914.bin
fd3792de1b388b85e9e0dab81ba9e497caabd9007faa669ba000b3455312bba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD914 16924 bytes
font_02_sfnt_off00010523.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10523 16792 bytes

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