Malicious PDF — malware analysis report

Static analysis result for SHA-256 28634370b5de681b…

MALICIOUS

PDF

73.6 KB Created: 2020-12-27 15:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f76ce6c8b3a13dbe350629ea13242a2f SHA-1: 91e949d989694b0be4c4157066e6f3928bd233b2 SHA-256: 28634370b5de681b7a84e079aa5448be3e67c01d2cf22a091046b14a72887b8b
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link and a link farm, indicating an attempt to direct users to malicious infrastructure. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were extracted, the embedded URLs and the PDF structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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://gettraff.ru/wb?keyword=descargar%20booking%20revolution%20para%20pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5fbe9e6451879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383805/normal_5fbe336e3328c.pdfIn PDF document text
    • https://norudajesopoz.weebly.com/uploads/1/3/4/3/134340776/1474834.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/211e017a.pdfIn PDF document text
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/belosinu.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/c6930469-d3b3-41ec-b0a8-e8519a7bb90c/kojikutefefev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5bb0146-c0f9-4645-85f3-fe517f941e84/cheatham_county_library_kingston_springs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143b143a-2174-4404-9ab1-a6dd736cde16/xiturivoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9cb700-12ee-4296-9ce2-607e6c1c95d1/latest_zygor_guide_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a794b401-d36a-4f94-9b9e-3a61a0978fbe/xuzufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f252f5bb-9bb4-4b58-841a-33531784844a/3793781422.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_off0000e0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E9 5364 bytes
SHA-256: 6b1c13eac9a847188bfcfe70bebff19b0e6f77abd39de2ef737aac32a2f53eab
font_01_sfnt_off0000f349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 11184 bytes
SHA-256: 026bf48ef39d5881baecd5ed1fdbb30d9c6ce8253a9d4cf34665c30a129757d4

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