Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf053ad37cac21b0…

MALICIOUS

PDF

73.1 KB Created: 2020-12-23 11:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 10276217b1cc4caf0846d344852fe16d SHA-1: c6ddbe4e0be91cd74dfe475ed1f427bb0aba155b SHA-256: cf053ad37cac21b0b10a9a50be8399060e39c0de6704bf82e316e055af95939c
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed as a link farm to redirect users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=football+world+champion+keyboards In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_5fda753cbf068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420235/normal_5fae6cf16085e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388040/normal_5fb43b2c0b17b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473656/normal_5fdb734b9d04e.pdfIn PDF document text
    • https://xaweworamek.weebly.com/uploads/1/3/4/6/134610398/zupuzetuzorobote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f89d2b6cdcd9.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/xamapebonijos/navigation_bar_android_pie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfbb73fb-0ccc-432c-84a6-f356b4b171a3/40973578690.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/the_human_brain_anatomy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe13b7d3b87d62887730803/t/5fe161e600a6e529c8065bb4/1608606183915/bhairava_movie_music_ringtone.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_off0000dfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA5 5664 bytes
SHA-256: 3426e0f7957fe1e645fbba4c25c18e456dc10459159ad46779ad2bc3ebab116a
font_01_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 10916 bytes
SHA-256: 3cadba82149503c8ce2e1228e36a01bcf0187239a8d55312fa9acf75ca098577

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