Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ddd89c2254e6009…

MALICIOUS

PDF

76.1 KB Created: 2021-01-04 15:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: cd5438151c6319add04ca2d17a28f3a3 SHA-1: 3ba2aa4010ac431cca431c3ae7ab59deb50903d7 SHA-256: 4ddd89c2254e6009b6024c6074f1877338f3145c91a05041a89c15f09d32c807
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a known malicious domain, identified by multiple heuristics as a malicious redirector for phishing. The embedded document body text, though heavily obfuscated, appears to be a lure related to a group exercise schedule. No scripts were extracted, but the presence of a malicious redirector strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=jm+tull+ymca+group+exercise+schedule In PDF document text
    • https://cdn.sqhk.co/muresogus/G4gdgcY/91465154102.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/d1idie1/85721203673.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee750cb6-0f45-4cfe-b46b-0b2a1234c115/52775420120.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/2661280895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ee9c11-a0f1-401c-86a3-12acadd0d188/lock_screen_wallpaper_android_anime.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/strength_of_organic_acids_and_bases.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/ignou_bca_solved_assignment_2019_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdacf36f-f710-49aa-ab16-2152c713a125/bexunududekubilijej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29da594a-9942-4db6-9c40-0f6f02ded217/fast_and_furious_civic_body_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/80276489601.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/phpspreadsheet_header.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79db4b62-d6c1-4133-a526-144f4e6c1d79/dufaxudag.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/81677327852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec307c1-b399-4943-bec4-f2f465f00fb4/wasunomegigoxuviwojujutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f393d659-5c2f-4db3-8989-1a48f88d4a15/53837195860.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AE 5648 bytes
SHA-256: 02f23a14f781a6c3905b0e0789821f81c2f7a11ca934c29358104d0dd665cc29
font_01_sfnt_off0000d4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BC 4380 bytes
SHA-256: b615d19f4ddde1f5872319c0e4ff9310cef2d21b3f79ab34c41968026caa5c01
font_02_sfnt_off0000e506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE506 11888 bytes
SHA-256: 1c0f0695f8ad206d150a29bc386d3a0473a8eda4324426e1031e11d3ff71990a
font_03_sfnt_off00010da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA1 16148 bytes
SHA-256: 34156ade4ee50cf1118f5962ba40672451949f75027aa3b188a7ffba1e6a2c5f

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