Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f7fe0fe3daaaee…

MALICIOUS

PDF

61.4 KB Created: 2020-11-21 19:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: dd9b87a4e0e7f60e2cc5e1c46249c2c0 SHA-1: 228c60179e0f2c22d6e0456200cf4c8897b0de73 SHA-256: e0f7fe0fe3daaaee259b18428a1192140ffd5406f8fdfe03ab17cb9ddb7ed6e5
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a primary focus on directing users to 'trafficel.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scam purposes. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafficel.ru/aws?utm_term=chapeu+de+formandos+vetor PDF link annotation
    • https://bevokelas.weebly.com/uploads/1/3/4/3/134310014/ba4788be6bec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422377/normal_5f9d3a49b3c1d.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/212616.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/nitamexagodefegomuka.pdfIn PDF document text
    • https://widobane.weebly.com/uploads/1/3/4/3/134340358/fipulozab.pdfIn PDF document text
    • https://diporatefumidal.weebly.com/uploads/1/3/4/4/134489634/zujefabixeti.pdfIn PDF document text
    • https://raralulewuk.weebly.com/uploads/1/3/4/4/134478892/36a03d3fea.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/kumasala/seraxokaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f057a663-e835-4cf1-8566-96d7ca94c95e/kubimogupozuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a2c185-d991-40a2-8507-317a3137e1c7/xatozukajuvirad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1154712-ca5d-4736-ba8e-9f04a75f1266/8535497386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd4f8725-f7a9-4eb6-9845-175f459a2225/bibopomoguxetomalajo.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_off0000b4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C4 5216 bytes
SHA-256: 30a1555e6aae45346ea2d3d11f9a89dda8eb099cdd57639e57721b78802c2997
font_01_sfnt_off0000c660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC660 10336 bytes
SHA-256: 541065422ecf0549df6dc012bbaeab30134669131fb4b9f1a7e0e9be49a820f4

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