Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e3b622e09f986a…

MALICIOUS

PDF

86.0 KB Created: 2021-03-17 15:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ebeaca72cfaf8d67338629215530cca3 SHA-1: eb2e73ae611ee949113e10650f06004bd899ceb5 SHA-256: d6e3b622e09f986a6ecda9de9cd20c36e0cf27e3293626a8842f8550bf29d714
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of a 'download button' lure and a QR code redirect further supports a social engineering attack vector. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it is designed to redirect users to malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://dugedepap.ru/123?utm_term=uc+browser++for+macbook PDF link annotation
    • http://davupopebuwiser.sportsontheweb.net/starting_out_with_java_from_control_structures_through_data_structures_4_e.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/hjNngib/dr._davey_daniel.pdfIn PDF document text
    • https://cdn.sqhk.co/davusegeb/Hbmhfhc/cramped_up_stomach.pdfIn PDF document text
    • https://fojozotewimoko.weebly.com/uploads/1/3/5/3/135324817/1140187.pdfIn PDF document text
    • https://satufimitu.weebly.com/uploads/1/3/4/7/134715308/borasi.pdfIn PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/55a24.pdfIn PDF document text
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/8637756.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/tutasujal/nogivixigeparemon.pdfIn PDF document text
    • http://wiwosotu.myartsonline.com/who_moved_my_cheese_overview.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/78343655168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f8e40b8-9f2e-4474-8972-1920ca0a5ebe/vevopamebedalefopon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac390751-8c57-4781-b37d-428bb8180fd0/introductory_econometrics_a_modern_approach_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e69e571-887b-4b4f-88c5-4b8c95f2e8fe/what_is_creative_thinking_in_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/appreciation_letter_for_employee_format.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/buccaneers_week_3_injury_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/costa_del_sol_resorts_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/66827959800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dacd403a-0048-4e56-a18e-a6da1a6e3e44/cisco_catalyst_2950_24_switch_price.pdfIn PDF document text
    • http://zuputes.atwebpages.com/19538557679.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/2316298901.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/how_to_redirect_subdomain_to_port.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/gatoguwezudupikose.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD0 5280 bytes
SHA-256: 3e84e39fe1dc8a6b42a233c4e58fa255b1c8c9962385b106b22685cc0a2b69ee
font_01_sfnt_off00010fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC3 2480 bytes
SHA-256: 6ee9505a1d9f2ab99637fd2795da64968ae8ee9875d9f10285c3e715c4f5a499
font_02_sfnt_off00011abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABE 19984 bytes
SHA-256: 181b676543384a9747f9907631c9fac0602733e76ea003161aef59db0198cc4e