Malicious PDF — malware analysis report

Static analysis result for SHA-256 952aeb953666b7c9…

MALICIOUS

PDF

73.4 KB Created: 2021-01-21 18:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 35cd685a6a4535d938f3ebffe6bac2be SHA-1: 9b366825737482481f6e4e229e95826af93efc20 SHA-256: 952aeb953666b7c977e4646fcba89d39cac28e2bdcfdffd2b2ad7abbc1f9be45
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs pointing to various domains, including 'traffset.ru' and 'duvewukabiwetu.epizy.com'. The presence of a link farm on disposable hosting suggests an attempt to distribute phishing content or redirect users to malware download sites. No scripts were extracted, but the structure and embedded URLs strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffset.ru/wb?keyword=%D0%BD%D0%B5%D0%B1%D0%BE%D1%81%D0%BA%D1%80%D0%B5%D0%B1%D1%8B%20%D1%8D%D0%BA%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%D1%8F%20%D0%B8%D0%B3%D1%80%D0%B0 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457570/normal_5fcc560f98603.pdfIn PDF document text
    • https://sopuduzebuvagaf.weebly.com/uploads/1/3/0/7/130775825/mubiziwidufofepigo.pdfIn PDF document text
    • https://tefakunuti.weebly.com/uploads/1/3/1/8/131871494/sisimexusimaniduse.pdfIn PDF document text
    • https://wotutokope.weebly.com/uploads/1/3/5/3/135315373/6971542.pdfIn PDF document text
    • https://cdn.sqhk.co/xelibini/5NRKb2r/zowibupujasolebipe.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/lajile.pdfIn PDF document text
    • https://cdn.sqhk.co/bepifopid/Gjbhe1Z/business_manager_jobs_in_schools_west_midlands.pdfIn PDF document text
    • https://wevejabunom.weebly.com/uploads/1/3/1/4/131406075/ce9f9a01.pdfIn PDF document text
    • https://weranatowo.weebly.com/uploads/1/3/1/4/131408071/zagibulinelemel-wiporag-tijanefavikufu.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/5KllMgR/dudimamamifutosasofixizo.pdfIn PDF document text
    • https://cdn.sqhk.co/kipebakebe/FjieHii/world_history_timeline_activity_ks2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5fe0e501d0b8c.pdfIn PDF document text
    • https://suwudaxodorepe.weebly.com/uploads/1/3/4/8/134885248/35da6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duvewukabiwetu.epizy.com/71356262030.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/oscar_wilde_biography_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/nokojox.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/capacity_conversion_worksheets_for_grade_5.pdfIn PDF document text
    • http://xevorerokune.epizy.com/25406094389.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_off0000d4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AD 5744 bytes
SHA-256: d186c5895fb09926726412739f8dc6e77329246060f3e2dd34c00b47decce45a
font_01_sfnt_off0000e7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E0 15064 bytes
SHA-256: 6a3de26731dc5dae1fdb7ed0ae15b8c4676191b0438d80a815cfe0a8e9587bcf

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