Malicious PDF — malware analysis report

Static analysis result for SHA-256 50af7163ca3058ce…

MALICIOUS

PDF

76.1 KB Created: 2021-05-30 05:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f3525e1cbc2d664c64dcd03c913289ec SHA-1: d2beb130af77610d47522cbd5ca52e4016529239 SHA-256: 50af7163ca3058ce5f6f58382907287752f98231ff58217754c68c75e0bcefb8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also flag this as malicious. While no scripts were extracted, the presence of external URIs and the overall structure point towards malicious intent, likely related to phishing or SEO manipulation.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/strik?utm_term=ham+cooking+oven+temperature PDF link annotation
    • https://jikevumuvovidu.weebly.com/uploads/1/3/4/3/134324483/4089165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_6033e265d93bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479938/normal_5ff65b17ad7db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387050/normal_5feceec8a0c9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_60397f98de534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_605f88daaf9f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366406/normal_5fe10be7acddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379611/normal_604e20f733eea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447460/normal_5fe729552a859.pdfIn PDF document text
    • https://zopewurexolo.weebly.com/uploads/1/3/4/5/134519391/xopepeninilape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_602f7acaa6650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5fd261964206c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473035/normal_5ffebbcc0f7e2.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/87f13eed-1618-4c78-9e63-fa921be9a4e7/26262721611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1b96267-16c3-40fb-8520-991ae5abf2d1/53006065322.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_off0000ebe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE6 5128 bytes
SHA-256: 33d1b1f4f1f3a345fc1c63c3ea6f655e68644e1377330279f7111592a4bf1a04
font_01_sfnt_off0000fd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 10648 bytes
SHA-256: 23449a82891f9b578c1e4749807824c8e4f7b0e49dd0ab7e2b92435f2483c385

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