Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbfcb282e82cfb7…

MALICIOUS

PDF

71.8 KB Created: 2020-12-22 01:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6e905bd7b25ee221b91f5dee7c0b58c0 SHA-1: 724777d7371c0229b90a0cac47319f187af5d14e SHA-256: 3cbfcb282e82cfb748bf5bc3a12047f7c8012451ea586ecd9674ab59ec7e9bf3
194 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The primary URL identified, https://traffking.ru/strik?utm_term=fs17+spectacle+island+ferry, is used to lure users to a phishing site. While no scripts were explicitly extracted, the PDF structure and the nature of the redirector suggest an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/strik?utm_term=fs17+spectacle+island+ferry In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_5fd650091b580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458412/normal_5fa0e346b291c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465250/normal_5fdd11e75ffed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489977/normal_5fbcbaae2f876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_5f96a282464de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402948/normal_5fde9e894c753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5f8834face774.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5af5f12facd59cecdbb78/t/5fd6b3a4ab777271769bf230/1607906214638/xewoni.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0667f3de5e49b52b051f/1606288999631/67530867223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1816eed8-e06f-406f-945b-1b66c2ce7133/tenim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea18dfe-13cd-4461-93f7-f3ae8145c9cb/music_production_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab735604-7421-4d68-911a-57a02a0f9570/mtf_hair_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8fe57c0-baee-4a5f-8586-6ae975f64532/st205_75d15_trailer_tire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2313e29-f6bf-4a25-b8b5-fcafef17b5b7/59418042943.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55A 5336 bytes
SHA-256: 1674c10841a2ad1859e45ac1366040ba4d89f0f98084e0a2e4a7212b38a02aac
font_01_sfnt_off0000d7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A6 10436 bytes
SHA-256: c1c61a649df466cd0b295de6cbb8ae016b434221fc32307a9205274ee7aeb91c
font_02_sfnt_off0000fbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 16196 bytes
SHA-256: ed614ff3ac2e387b3dffe3adc8533a73dd514e171fc201cb60d70b5b5a32e0ff