Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03a3eca894de137…

MALICIOUS

PDF

84.2 KB Created: 2021-07-16 02:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8b849d92262ba6545e32f917cf5ccc5 SHA-1: 813824c0fbac7cbf9305acdbc89b987ede12bc27 SHA-256: d03a3eca894de137239d6b98b2dd7881ea825af814b9b43554d86cfe59b1b0bd
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. It contains embedded URLs that likely lead to phishing content. The presence of PDF_URI and EMBEDDED_URL heuristics indicates an attempt to redirect the user to external resources, consistent with phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8840

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/AG-UZpNbJGc/square?utm_term=easy+sunday+lunch
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f06582ac785a4b5babdb84/1626367362319/example_of_order_of_adjectives_in_a_sentence.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f092a20808126089f35675/1626378914441/33089432794.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e862426a722549e4220339/1625842242257/read_a_person_like_a_book.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0b7eb7470266f82917fcb/1626388459453/xudob.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f068751e6fa57ab570c97d/1626368117610/role_of_business_analyst.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f06d15879cfb2b826e72d5/1626369301486/vocabulary_for_reading_ielts.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee1fa17d49fb55d6253575/1626218402068/therefore_the_redeemed_of_the_lord_shall_return.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_off0000e9a9.bin
60c158ffcca88fc0f4fc1b08a3fa41cc0dfc60e456404490e86df8fcc1966328		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 10124 bytes
font_01_sfnt_off00010024.bin
4ff6ad48845268eabf47a52b3b27f5446f6f787309e6c4a5af8afcaa2dc83b09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10024 16800 bytes
font_02_sfnt_off00012bd5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD5 16792 bytes

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