Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7940ba4726804e…

MALICIOUS

PDF

75.8 KB Created: 2021-07-16 08:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 48f066a61b4a49143cecd468c19618af SHA-1: 1ad8990a34d67dc96c20667740a6d042c559d768 SHA-256: 2e7940ba4726804ee8d2b349b0bc27ed755e0b4008e4aa5ad85f139dc7d8ed38
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI that, while currently marked as benign, suggests a lure to a potentially malicious site. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the presence of PDF_URI and ML_NYX_PDF_MALICIOUS heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/~3/4aHNpQc2m6I/square?utm_term=increase+pdf+resolution+online+free
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee7391b1f8b95648890646/1626239889143/use_helmet_while_riding_a_bike.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e864230fea934c8596b20a/1625842723811/50528495753.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eda5d77d02012a3632c93e/1626187223188/49726812302.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94544085b1c120f994f4b/1625900356267/45975353148.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_off0000c84e.bin
69c55df224fc400476b9567cdea5369f93339e90525f53eb29d09b929f088bbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC84E 16596 bytes
font_01_sfnt_off0000f3a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A2 16792 bytes
font_02_sfnt_off00010bb9.bin
bb0676420f6a3b09ef8b67cef07854fdcca09df9d9cef748b9955cdfbdcfd0ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB9 10664 bytes

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