Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4e2a182c00a098…

MALICIOUS

PDF

88.0 KB Created: 2021-01-09 11:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6f7758fe1c22ed6ac3dbbda7bac3f4a0 SHA-1: 0fc0f1de76a7efd84dce87f66f28835f5947eb65 SHA-256: 5f4e2a182c00a09807ef824a427696ee8c23f823cb051dc3b5ce0852579dc9b4
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous links to external resources, many of which are identified as malicious redirectors or part of a link farm designed for SEO manipulation. The presence of ClamAV detection and ML classification strongly indicates malicious intent. The document body, though heavily obfuscated, suggests a lure related to technical schemas, likely to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/wb?keyword=cours%20schema%20electrique%20industriel%20pdf In PDF document text
    • https://cdn.sqhk.co/xozakatupab/rPW2pha/bogilomiwusisupozeb.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/wuzibadegutorobe.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/cijR4ie/gugosifovegiganujo.pdfIn PDF document text
    • https://mitumusifunezu.weebly.com/uploads/1/3/5/3/135316179/f3490e198.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/hjCvdia/69180462787.pdfIn PDF document text
    • https://teribizekejuxes.weebly.com/uploads/1/3/5/3/135391999/86483.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/1e420e731.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/0Z1ehgL/26694810086.pdfIn PDF document text
    • https://cdn.sqhk.co/simosukolevo/371g54v/91355254810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/kuwunapij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d692d735-bc22-4361-b3b6-8fd16f86284c/93517264195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a46a282-20c6-4b9e-ab21-841f929f1382/joplin_mo_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/edexcel_functional_skills_english_assessment_record_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edda793f-30f9-4dad-a6b6-958792494b39/sadamugano.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001173e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173E 5428 bytes
SHA-256: e4ffd271decea09141510d7d0c9b3e3ca705b54e2467e9a96553ca41fd5ef6de
font_01_sfnt_off0001297e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297E 12544 bytes
SHA-256: 3ff1ff878deee07d9fb80403e695926fc3cedb822a57e53455a71372fd1c4d6c

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