Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e95795c9ab038df…

MALICIOUS

PDF

67.3 KB Created: 2020-11-26 04:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: af9d7f5d3fede25e7a860566a016ad8c SHA-1: c17b2d0d5f440f122d984983e7ba15e6f7d4a081 SHA-256: 7e95795c9ab038dfa06a33961eb7fa4980e7fdf4528e892ea5ccff7088364e83
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to host malicious content. One critical heuristic indicates a link to known malicious redirector infrastructure, and another heuristic flags a social-engineering lure to install browser extensions or updates. While no scripts were extracted, the presence of numerous external links and the malicious redirector strongly suggest the document is designed to lead the user to malicious websites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/strik?utm_term=google+drawing+comic+strip+template In PDF document text
    • https://sulesebu.weebly.com/uploads/1/3/4/6/134634805/7c5e54.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/9095153.pdfIn PDF document text
    • https://mikezexevi.weebly.com/uploads/1/3/4/5/134528008/wusezuvov.pdfIn PDF document text
    • https://wudizibi.weebly.com/uploads/1/3/4/4/134477582/b9896a.pdfIn PDF document text
    • https://tadiseregofinu.weebly.com/uploads/1/3/4/7/134748358/579c57a8e254c39.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/teximikamukubo/cartel_de_los_sapos_serie_completa.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/753_credit_score_equifax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca474b3-aaf1-4b30-965f-42d3a86b4b23/pebiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/call_of_duty_ww2_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18249817-7e73-437c-a1dc-b4c60b80d1ea/xovureted.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/clash_of_clans_october_update_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/curriculum_vitae_example_in_english.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_off0000c8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FF 5516 bytes
SHA-256: e70bd6f32bb70013f2c365d89a3a5ada26266560437ff28a239b02331c92858e
font_01_sfnt_off0000dbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC0 11256 bytes
SHA-256: 83fb812a6bfae807b0f9bc79373e29d07bb974a465fda05d72eabf3584de73d8

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