Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba4846382033ea6…

MALICIOUS

PDF

67.3 KB Created: 2020-11-24 10:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 96342d9499aa09e79649461559cb1060 SHA-1: 0eeb5bc4148131ded452d9006f989339ce2e8655 SHA-256: 5ba4846382033ea6e1cf7cffff164b6eceefb9ac76b94bbe5c2015d8f8f568ee
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and the presence of external links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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/123?utm_term=adoption+reference+letter+examples PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5fa8e6cca3e77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454163/normal_5fb684d6c3884.pdfIn PDF document text
    • https://fomikozifu.weebly.com/uploads/1/3/4/5/134511133/bebasapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423757/normal_5f992916b9472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455176/normal_5fa17d4b7e3ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417659/normal_5fb77639461a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426263/normal_5fa25ba51a1aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458824/normal_5fa2d17277536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f89ba0fedac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_5f8f63d32f869.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/4917281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486041/normal_5fa7c7bc31e24.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/zijivevip/respective_medium_definition_in_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b348569d-ddb3-4afb-8bc5-963f7b1535be/loditijenazamamupusulav.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/jinobobuliwuzafepalade.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_off0000ca94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA94 5360 bytes
SHA-256: 24ce7f8f6f4fa13be24b54fa6bfed0853111362cce1521fb457d1052e3079ba6
font_01_sfnt_off0000dcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBF 10320 bytes
SHA-256: 10787749f351f9c332f8bcef79770887c71a5dee4fa807b5970b5fcba97e4ad8

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