Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4eb4751d461d14…

MALICIOUS

PDF

80.9 KB Created: 2021-07-13 05:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0b88cd67d8b19e6a0ad814b1bb1d9112 SHA-1: d65a6abb8eb006652a9945369196bca3e33e4a71 SHA-256: eb4eb4751d461d147139389b3a145dc0030fae5a63278780fb63ebf500630855
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. Heuristics identified an external URI and an SEO redirector link pointing to 'https://pistant.ru/square?utm_term=things+to+paint+on+windows', suggesting a phishing lure for free downloads. The document body is heavily obfuscated, preventing analysis of its direct content, but the overall indicators point to a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://pistant.ru/square?utm_term=things+to+paint+on+windows PDF link annotation
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec94437a6a1626764a066b/1626117188071/70909456279.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec872aef188817f7e1b9ab/1626113834510/if_my_complaints_could_passions_move.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecaa5877250868137077f4/1626122840543/appetizers_for_chicken_dinner.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7ce7760c9e2bcf426372/1626111207285/database_testing_interview_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecdfa2f95b5524f94c54fc/1626136482461/financial_attest_audit_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7b6d9872c4c6263c32420/1625798361665/21775583528.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e90f62dc37083541b80141/1625886562915/zugedagarokegixupigepa.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecd28b7fcaa334213153de/1626133132204/82994437318.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7b686efb14d11220f4872/1625798278805/57295577014.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e76f2b046c3d00506e9ab7/1625780012337/maths_olympiad_for_class_3_worksheets_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e924a019a9f87deb72ee43/1625892000867/pajavunelalufokexite.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8fd623f195e1e4034db42/1625881954573/indian_nose_job_before_after.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_off0000ddaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C1 10444 bytes
SHA-256: 5ea0d065d7eac4fe6109fe6ae42e7324fb2401ab324ba8aaa297c9be0a6ed4ce
font_02_sfnt_off00010d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D39 16196 bytes
SHA-256: 162484b163528707b813b400edb914f6d0ce475c11e2fb822a92bf72ffad14f3

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