Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5a650537e768b3…

MALICIOUS

PDF

65.0 KB Created: 2020-11-25 00:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 861ff425d17a25f1b14ff913f9dce0dc SHA-1: 60ad6bbfabe0731eed2855587ce4866a42b93f00 SHA-256: 5e5a650537e768b3cc3b69c7e54ad3617517aa79eef7cd2e5dd935cd61e7234d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains an embedded URI pointing to 'traffset.ru', which is likely a phishing or malware distribution site. The heuristic 'PDF_SEO_LINK_FARM' suggests the PDF is designed to host numerous external links, further supporting a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/123?utm_term=i%2527m+not+just+a+scribble+stickers
    • https://cdn-cms.f-static.net/uploads/4408479/normal_5fa2ac1debaf5.pdf
    • https://cdn-cms.f-static.net/uploads/4499285/normal_5fba1e9055e45.pdf
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/meladeta.pdf
    • https://xexasatokotubeg.weebly.com/uploads/1/3/4/3/134354060/ruxemizumaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dumupa/commercial_property_development_business_plan.pdf
    • https://uploads.strikinglycdn.com/files/ae2706bc-d70b-4b0e-88a1-d6722ca74943/45031540517.pdf
    • https://s3.amazonaws.com/mesixadelomomo/xajulefixesenozuga.pdf
    • https://s3.amazonaws.com/xiwevitox/return_to_halloweentown_full_movie.pdf
    • https://s3.amazonaws.com/vuforewebub/2388834634.pdf
    • https://s3.amazonaws.com/jazofi/galufamojujagep.pdf
    • https://uploads.strikinglycdn.com/files/901b0e6d-d631-4e2f-ae1c-15f6dacb15d1/45326474018.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9b7.bin
ac337b4b645f6b70f63b556483889862074880aa2f7b9b41fbade29680af2ec9
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B7 5196 bytes
font_01_sfnt_off0000cb49.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB49 1800 bytes
font_02_sfnt_off0000d3d7.bin
fd9f4edad5112b231fb332d5ea6d772cfa26920c4f9de7cd0838a9ba3c0d5729
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D7 10272 bytes