Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c257060ff26a7b…

MALICIOUS

PDF

74.9 KB Created: 2021-07-13 20:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42559d5a438215d256ac6cc1c3a5c234 SHA-1: 80b841c78646cfa497813806b36045f6a935e8d1 SHA-256: 79c257060ff26a7b4b9cd079dc8179b2e796894d0519e8de68892fb000110014
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a PDF with embedded URLs, one of which is flagged as a potential phishing lure. The ClamAV detection and the presence of external URIs suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of specific execution techniques.

Machine Learning

  • Nyx PDF Classifier clean score 0.2303

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/HbdJGeoIq_s/square?utm_term=squamous+cell+carcinoma+espa%C3%B1ol
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed896d4182611181b7f1f7/1626179950015/one_and_one_mail.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed4bb7493b4338208befcf/1626164151680/different_types_of_sailing_ships.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_off0000c5f7.bin
4afd516fa89c180a947d1bc475cafd0c5fda3e6b4c9b526dff48c85d8d997fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F7 15284 bytes
font_01_sfnt_off0000eccd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 16792 bytes
font_02_sfnt_off000104e4.bin
d7d108552885c63d487e5feacc7f3d3273b8d9ec09eae45dddb59c1480420a8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E4 10964 bytes

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