Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e7f2e1e53909ed…

MALICIOUS

PDF

65.0 KB Created: 2020-11-09 22:25:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 197e69d4d192a9d1064f53666a0bac9e SHA-1: 97c629c146fbc6a4dddb33edef247492b09ef813 SHA-256: 78e7f2e1e53909edc8e7e0683a328352e2323b7369db8ba4dfaf60351d0839c7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for a PDF link farm and ClamAV detection as a phishing trojan. The document body, though heavily obfuscated, contains references to search terms and application names, suggesting a lure. The numerous embedded URLs, particularly those pointing to Weebly and other hosting services, indicate an attempt to redirect users to malicious or SEO-manipulated content, aligning with phishing or spam campaigns.

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://trafftec.ru/strik?keyword=bowflex+ultimate+2+rods PDF link annotation
    • https://zuragani.weebly.com/uploads/1/3/1/4/131438510/3757314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_5f8b10a435ed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f8c70522a79b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f874300b1dbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_5f9f83761a62a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408983/normal_5f998a6415069.pdfIn PDF document text
    • https://bisitewo.weebly.com/uploads/1/3/4/4/134496646/kuzusaxixogevekapiga.pdfIn PDF document text
    • https://wozijasobinela.weebly.com/uploads/1/3/4/4/134445001/sidebitamibo_sesaxinutufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5fa86fbeb4d17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f87365c66855.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/dugibabafod/bitufurepepotizewom.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/51985441922.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_off0000bf4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4A 5396 bytes
SHA-256: 8d1706ed2036136c6b6c0d9c794ea17b5518eaef9a77b78b9d77e3c45e845bf8
font_01_sfnt_off0000d1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A5 11340 bytes
SHA-256: bfb57e4ce09a23365c5ae0348254a0c94e91751a90ae4aba93c635f6add67724

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