Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b43717f702818ce…

MALICIOUS

PDF

74.4 KB Created: 2021-01-04 01:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9ae21168546b0a5ee6ecfc1e187f8978 SHA-1: 7a67f1f1513fa3510689375e8dd9bededcd18a6f SHA-256: 4b43717f702818ce8c60866a765da188d2fa765fa81a2f9545f0dbd3444c5949
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/aws?utm_term=facebook+page+name+change+guidelines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447273/normal_5f9e8a0e40890.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/fexasekeniwir-retosepabire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f86fe96f151c.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/lijjijd/tonopupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5fb5a0ecd7161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5fb75cec0427f.pdfIn PDF document text
    • https://tunuwowidu.weebly.com/uploads/1/3/4/6/134606858/0ddb6c70402d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_5f90a6164e272.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1377de6e-8554-4e1d-a4f5-feeae68da356/running_on_empty_jackson_browne_full_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e4ea67-67d5-411a-accf-bb09f18f8012/68242113874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5dd4f43-65c8-4362-b2e5-86677fda76ad/pazisegewavinurenameref.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD816 5352 bytes
SHA-256: 5155ef72d3f983c57a122dada7bfe56b71f7d2c3ea16a46f53fdcf7f05343ab7
font_01_sfnt_off0000ea06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA06 10684 bytes
SHA-256: eb545c30aa286f42d81e1f03671613f157d20fa0c29a7363923e19c369deaf27
font_02_sfnt_off00010e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E96 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378