Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead9c1fb9d07e6eb…

MALICIOUS

PDF

69.8 KB Created: 2020-12-20 21:08:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 759f40cbf095ee47ddc9bef38cfdd793 SHA-1: f89b2d78cee13f37ff84c6e17a447cc87db95b6f SHA-256: ead9c1fb9d07e6ebacebf50bb0c628570cdb69c0d72ed1ec265602bef87b9983
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one pointing to 'traffnew.ru', suggests it is part of a phishing or malware distribution campaign. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses time-sensitive language to prompt user interaction. No scripts were extracted, but the PDF structure itself contains links designed to lead users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffnew.ru/strik?utm_term=5e+lizardfolk+racial+feats PDF link annotation
    • https://vumopiwerelo.weebly.com/uploads/1/3/4/7/134730258/jozajeguniwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_5fb2f0b8e405d.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/2754422.pdfIn PDF document text
    • https://sumulejuno.weebly.com/uploads/1/3/4/3/134361372/4e7ca45.pdfIn PDF document text
    • https://dorijalasenotom.weebly.com/uploads/1/3/5/3/135327318/313643.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/ced80f20-0ccf-48c0-a2bd-681ab8326e42/40379283687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b0cea39-b9c2-429a-b45f-43d4e37710ab/79405869557.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf3a708845d09244f8a17/1606284200493/le_van_thanh_scs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800ac0f5-1c62-4670-b3a0-a93e6dee4c24/4149890086.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/58116717707.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_off0000c76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76E 4840 bytes
SHA-256: dc91e43fa3c5d12844155b1e1fa92d5c35ceea3a3a779d1f466e39c095abb856
font_01_sfnt_off0000d802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD802 10648 bytes
SHA-256: 46eb4fd0a985d232a36d6760eac2c8953fe7958bfece79732c3e90ae1665a7bd
font_02_sfnt_off0000fc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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