Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef6630c5f347dc8…

MALICIOUS

PDF

85.4 KB Created: 2020-11-18 03:16:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d35a71b7867b3ab648398bb4d1e31675 SHA-1: 9a460a91e5f486e7def8e92f25cc65f39ffec86d SHA-256: 2ef6630c5f347dc8e8ad69cf05aea438aa9be91ade8241b4404ac3ce6f3d5ace
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting services and redirectors, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffking.ru/123?utm_term=bronsted+lewis+acid+definition In PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/5613040.pdfIn PDF document text
    • https://xabopefasuliwik.weebly.com/uploads/1/3/4/4/134445681/remikulugozopo_wavogerevijij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419423/normal_5fa536b65cb00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481173/normal_5fb28fb21a002.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/gomedelep_joviwoge.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/5493933.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/9d97951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498392/normal_5fab214416695.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/tujavajex-zuxibiro-majuporojivu.pdfIn PDF document text
    • https://zexaloguf.weebly.com/uploads/1/3/4/5/134576330/608633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379618/normal_5faa558ff327a.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/bizamesuwepe/mathematical_physics_for_msc.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/14506367954.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_off00010bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 5156 bytes
SHA-256: 0044461d7adb014230fa01334b7bff03e58d247c6f03181325bc57d3ec82ebfe
font_01_sfnt_off00011d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D68 12676 bytes
SHA-256: 82e25a62cc00a1648916c4f7b1ce859921906c6af335bbf0149dff3a6be03061

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