Malicious PDF — malware analysis report

Static analysis result for SHA-256 1023464b1d13afef…

MALICIOUS

PDF

84.0 KB Created: 2021-07-12 23:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c59b895d73bcde4a25a377e0692c3e8a SHA-1: 1b8238ee0b252a4908f32bd1975759b4ef303af6 SHA-256: 1023464b1d13afef5ed760dfd7c58794425083be004cf39cd5a6430d21f309cb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with a critical heuristic firing for ClamAV detection. An external URI, 'https://infrive.ru/square?utm_term=psychological+theories+of+aging', was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and the presence of external URLs indicate a potential for malicious content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://infrive.ru/square?utm_term=psychological+theories+of+aging PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e84e93f084817bae61690f/1625837203972/1831200705.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7990f89f8e700bf67243/1626110352368/xorinujotofexejukeniva.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e912952210ba6bce119102/1625887381998/and_i_guess.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec94ae704a383bbedaeb1c/1626117295134/jitarimosubozu.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7aca5d56f0f36126e9ba3/1625795749901/91696507185.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e961b7fc46b1505829d901/1625907639130/if_i_liked_little_fires_everywhere.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec77e0ad4a1a22a3e6476a/1626109920634/red_haired_actresses_under_30.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec79a1288cf71862a8867b/1626110369567/developing_tactics_for_listening.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8c73cd7d143313afe9b0a/1625868092200/76349641600.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e777b76071824dd44f88f1/1625782199754/one_example_of_a_simile.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e94691085b1c120f995b49/1625900689497/68957776694.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_off0000e4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B9 10728 bytes
SHA-256: ba7c5a8c1666dd40978e85e0702f5e71026e97be60c7c85ad0bbf355897599f6
font_01_sfnt_off0000fd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD61 17848 bytes
SHA-256: 6b293d3ae310090e921ba2544b07c7df4b0395656054f5c858d747dc6ed51b08
font_02_sfnt_off00012b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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