Malicious PDF — malware analysis report

Static analysis result for SHA-256 2299b95a20a68cb5…

MALICIOUS

PDF

103.2 KB Created: 2021-05-25 04:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 66f2f67fafc4686aa94f17b295bba6c6 SHA-1: d467af3b0f67eeafe7ac631606bab5795c6eb992 SHA-256: 2299b95a20a68cb595afb3b5a6c82c463318ea75a541ee13d9c0399971b49dce
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://seumenha.ru/strik?utm_term=how+to+connect+touch+portal+to+streamlabs+obs PDF link annotation
    • https://moxeguzivega.weebly.com/uploads/1/3/5/9/135965209/7204870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498345/normal_606692950dbf8.pdfIn PDF document text
    • https://zulevoto.weebly.com/uploads/1/3/2/6/132696122/7800094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_601cf6beb6a6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373281/normal_5feb292f05621.pdfIn PDF document text
    • https://wipigoxexidon.weebly.com/uploads/1/3/2/6/132682030/edee562168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_60327de7311cb.pdfIn PDF document text
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/8996946.pdfIn PDF document text
    • https://tivowigelatel.weebly.com/uploads/1/3/4/4/134495783/vanugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470681/normal_600b53642c10b.pdfIn PDF document text
    • https://kukonugaxa.weebly.com/uploads/1/3/5/3/135327287/nixujibazifebuvug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492900/normal_5fdc7f4186b5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_5feee0d1d38b3.pdfIn PDF document text
    • https://mugejonisisekof.weebly.com/uploads/1/3/1/4/131437633/48edf284cc6a21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4bb965d-e6ba-4ad7-88ca-a68baa551e78/67516820703.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/blank_august_calendar_template_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/150ce064-a8f0-42a0-83b4-77b9104df970/how_to_get_rich_fast_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/75382018547.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_off00015577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15577 5368 bytes
SHA-256: ffa91f63f6b050a149cd5d4da1ca536ec6d4ef718d33b3fed67908fedbb418aa
font_01_sfnt_off00016798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16798 11736 bytes
SHA-256: eb2cb1f8672155588f072619b8f6dcabd30c24cd6d4c0496070d08b60bd8b27e

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