Malicious PDF — malware analysis report

Static analysis result for SHA-256 68efbfb2a6a8a64a…

MALICIOUS

PDF

73.1 KB Created: 2021-01-01 13:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8a200b79e3fbce3bff3b11d77c9cf7e1 SHA-1: 91761d5d3254d3c8387fb9e8d81fca39a92fabbc SHA-256: 68efbfb2a6a8a64a00283af1f7279fa9e4a1a44a2f6524e4f66ea5f9cc77b522
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and known malicious redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=tumblr+wallpaper+quotes+black+and+white In PDF document text
    • https://xelemurefitarag.weebly.com/uploads/1/3/4/6/134601467/rovefuke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425915/normal_5f9fc6ad592fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408184/normal_5fcf611f0f06a.pdfIn PDF document text
    • https://girigituji.weebly.com/uploads/1/3/4/6/134686745/bec4fa29e.pdfIn PDF document text
    • https://kezevamu.weebly.com/uploads/1/3/4/2/134266298/kububopexafujizis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459035/normal_5fbb26ba78b14.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/sabapetefidodi-puxiza-givusi.pdfIn PDF document text
    • https://buvusujekigipo.weebly.com/uploads/1/3/4/4/134453925/9517693.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387218/normal_5fcda1ce7760c.pdfIn PDF document text
    • https://bezubimuxidisa.weebly.com/uploads/1/3/1/4/131453869/fomerexud.pdfIn PDF document text
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/1719430.pdfIn PDF document text
    • https://nipifofopofeduv.weebly.com/uploads/1/3/4/3/134338269/lagadani.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473064/normal_5fc8a51c5775a.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/22216ecf-a138-4646-824a-5bca8e8b42b4/jakutoneg.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_off0000dda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA0 5684 bytes
SHA-256: c3b9e228b146d8bc3fc676f7600ba1400a7bbd5be4ad7059576019c324024e4c
font_01_sfnt_off0000f0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D0 12096 bytes
SHA-256: 8948450cf47cbf130177e307f7cf970ce5cd2e6f1ff86ae6047902ed6f8712d4

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