Malicious PDF — malware analysis report

Static analysis result for SHA-256 946de472979d052c…

MALICIOUS

PDF

95.8 KB Created: 2020-11-27 22:58:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5b2517f4362cf1777ac7cd01e57e7f80 SHA-1: 47620a20a0529705dbe4e67061343a9557fd25e5 SHA-256: 946de472979d052c1a7655a9f8b57188e70eb867d1869a41758fd742a60c605f
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to suspicious domains and appear to be part of a link farm designed to manipulate search engine results. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/123?utm_term=series+circuit+worksheet+%25231+answer+key In PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/rorabijudarovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f9b2ada8057d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484154/normal_5fb5493dde150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_5fa8eae9426aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487626/normal_5fb5a58393575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f8d824b16eeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f943548443f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5f8a2267b15b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479214/normal_5fb5d449d30ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495975/normal_5faa48e97ef34.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/lovomijelun/minecraft_mac_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/my_downloads_file_in_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/guided_imagery_scripts_in_spanish.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_off00013ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA1 4904 bytes
SHA-256: 0d26b0663237423ba5bf4274c4c167cd47dc9921e7ea9f2ea1b820951e709d99
font_01_sfnt_off00014d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D63 10956 bytes
SHA-256: d2c74d9b779182843e48dce9436680f408c10f35733ef4212c9032e2fe39ced0

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