Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3532af241201ea…

MALICIOUS

PDF

68.7 KB Created: 2020-12-22 08:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7b2e2de009f7e003c7d0a3df2a0697d7 SHA-1: e0199ddc9cf0ff5d68a91c06c0339bcb2c6cfeb3 SHA-256: ce3532af241201ea5ff5761b6589d38eb363e54bdffe048c91e02e57780b1d5e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with one critical heuristic flagging a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

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://cctraff.ru/strik?utm_term=music+90s+pop In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420915/normal_5fb6cbe44ccd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408589/normal_5fb2904373dd0.pdfIn PDF document text
    • https://jevetokisavov.weebly.com/uploads/1/3/3/9/133997370/mizosari-jezarag-bepuwe.pdfIn PDF document text
    • https://xinomufe.weebly.com/uploads/1/3/4/7/134706409/5ac6d524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489717/normal_5fb70d76e76e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471691/normal_5fdc61817c175.pdfIn PDF document text
    • https://maxuvejalova.weebly.com/uploads/1/3/4/2/134265339/5143849.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383702/normal_5fcb616cd0dae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_5f8ca535b0f30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_5f8cfffb72444.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5835a97599144eee868d/1606375479563/lapolalezalu.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/26741027947.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d6c88787e879896ba956/t/5fc95561f35c5801706f7134/1607030115006/marco_s_world_famous_pizza.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/child_funny_videos_free.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/county_court_attachment_of_earnings_form.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_off0000d151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD151 4892 bytes
SHA-256: 063fca5191e3093783077f5757c817634b3de1ab40d800f5e0022e80d6565005
font_01_sfnt_off0000e217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE217 10480 bytes
SHA-256: 764fafd815f26682608efdf805495ec01cc6781f0f235bd07dd489f18376996f

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