Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7fc6e4dde10f6f…

MALICIOUS

PDF

85.1 KB Created: 2021-07-13 16:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c590d19f271a9b3e03cdede939b838a0 SHA-1: 5bca53e462cb39de8c0560098469c6124a7f0f72 SHA-256: ec7fc6e4dde10f6ff386961921ed6dc6ab48337078e16ed4e46cc47efd101348
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, 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 embedded URLs are indicative of a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

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/razvivatel/yapz/~3/pL_UGxDroB4/square?utm_term=aphids+on+plant+leaves
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8451e94d7a30e0554d72/1626113105654/mibojaboxib.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7d4ffa40056e74d1a2ea/1626111311930/failed_to_detect_location_12_spoofing.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecdb879b2242424efe6651/1626135431634/use_of_hydrocarbon.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_off0000ecb0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECB0 16792 bytes
font_01_sfnt_off000104c2.bin
317a7c854d354d407a01756a54989f008e7f2f5e068e03b3e9af1277421931b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C2 17192 bytes
font_02_sfnt_off00013192.bin
4f2b9b421419a5c9183352e47e7149d3cc9105225b00d97dc261ef561e23566d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13192 10436 bytes

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