Malicious PDF — malware analysis report

Static analysis result for SHA-256 537ecbbdb66fc58b…

MALICIOUS

PDF

107.1 KB Created: 2021-07-12 21:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d28ab3ce402eeddf618caf6dd7e9a771 SHA-1: 5e870303eee6648efc0a93f9dc0dc603cb656f58 SHA-256: 537ecbbdb66fc58b9f6fe50802968fd8a31332a786f1d8c98528c1abea7313cd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that, while currently benign, is indicative of a phishing attempt. The PDF structure and heuristics suggest it's designed to exploit vulnerabilities or trick users into interacting with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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/sq/ugae/~3/J-SxIuB37Ms/square?utm_term=easter+egg+shadow+of+evil PDF link annotation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e90514cc7c08645925c9df/1625883924675/3000_euro_in_rupees.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e93d912210ba6bce130fac/1625898385785/rapeseed_oil_for_babies.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e877811ab7d215194fa8b7/1625847681853/tejejewi.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8ae3a18b8202efd04a9f2/1625861690293/md_380_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e928282210ba6bce1265b4/1625892905172/93413313039.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec868372e2584f24639cea/1626113667105/electrical_testing_and_commissioning_books.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e873ae3ebe920a78351e50/1625846702116/board_review_from_medscape.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8ee48defa333328a82347/1625878088461/beef_with_oyster_sauce_and_mushroom.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec851fe94d7a30e0555888/1626113311385/zerixizopediwotewiloku.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7aab7e2b6271615a8636/1626110636036/types_of_subsoil.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec864d8300fd66e1969657/1626113613383/fotuwoko.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec85a05f604029b991c1a6/1626113440799/simplicity_cribs_instruction_manuals.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14086 10664 bytes
SHA-256: 0b311fe80f314a003a009efa9ad585ddeaea45bbf511b74c660a7d528eaaca7c
font_01_sfnt_off000158eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158EB 17944 bytes
SHA-256: 7594fc1ff7cf8432776e51bb2e2c9022854edae99eacaa2b1fdd13bf66655ed2
font_02_sfnt_off00018820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18820 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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