Malicious PDF — malware analysis report

Static analysis result for SHA-256 62784be315b81120…

MALICIOUS

PDF

69.1 KB Created: 2020-12-29 19:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 67a9b39d0431715128fd7f2a934d6a7b SHA-1: 4eb2bfa56077c354815aaf45d724dcb49ed6854b SHA-256: 62784be315b81120dd13f8ca01bd1dfaa90264b58fef6fb8cf595b5134f55c57
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with one prominent URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scamming purposes. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

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://trafffi.ru/strik?utm_term=pokemon+cards+cyber+monday+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498392/normal_5feaed78ee998.pdfIn PDF document text
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/3269234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5fe86bdf15b28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5fa186add70e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460266/normal_5fcf9e34c4a1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484115/normal_5fea0e02f3638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427828/normal_5fb5e91954f48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_5f9ff7bc27e32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f8c5572d8bcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_5f9b1bfdd28c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404955/normal_5fc55ee7d77c9.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/5a675d2b-b20b-484c-9bec-62b3eb4a78f0/8729014609.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/angai_geete_marathi_video.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_off0000d0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F9 5840 bytes
SHA-256: b8be79a517294610203d7ec69b752fed06d3f191487c04d1b171b49007286057
font_01_sfnt_off0000e4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CE 10508 bytes
SHA-256: 97f97fe45e3bb0daa9c97e17130342271cbf1ec470184f358b86517db19eccf3

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