Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cae515bd8ece4a0…

MALICIOUS

PDF

77.3 KB Created: 2021-07-13 21:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: f84c1e890db950e09ddd06850d5eaabb SHA-1: 5cf54c5ce5397ccd3e63ae5ec540b63613287f6b SHA-256: 5cae515bd8ece4a082b1111ab16840fbbd97115f6d5c6bd1feee01a1193f4506
84 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it is malicious and uses an SEO redirector for a free download lure. The embedded URL points to a suspicious domain, likely intended to host or redirect to a malicious payload. No scripts were extracted, but the overall pattern suggests a phishing attempt to lure users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/square?utm_term=mtg+ncert+at+your+fingertips+class+10+pdf PDF link annotation
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec9f755f8bf9690720757e/1626120053994/interpreting_our_heritage.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e832214aaab0286a8e4424/1625829922003/second_grade_reading_comprehension_passages.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec8205a3e9df788e6d4310/1626112517426/invitation_for_debut_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed4e090124a666ff428bae/1626164745879/the_cell_a_molecular_approach_7th_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8fa7def1ca41d5fa0307/1626116007450/2017_dodge_charger_5.7_oil_type.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8ceab8b9e53115d66a706/1625869996037/madea_goes_to_jail_free_online.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_off0000ca70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA70 16484 bytes
SHA-256: 483d7c6fef5058cdb6ef94c71eecf0dcfff686ff17b2d4d5045b6feb3870b613
font_01_sfnt_off0000f52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D42 11176 bytes
SHA-256: 989d72f2780a5bcce136483477f239391e0dd7ec2b08a2aee6197712a2906f2d

Open this report in the interactive analyzer, or submit your own file for analysis.