Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb70695cea6e9e2…

MALICIOUS

PDF

60.7 KB Created: 2020-12-13 23:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d4cb3ddab95eae1154e2628a6ace2ab9 SHA-1: beae6ffc5fcf92f37e5b38b24c074143b50ebad6 SHA-256: 7eb70695cea6e9e28f9c4d7a240dc585559ae46de3c2072704d49d73bd63e303
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 0.9996

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://trafftec.ru/strik?utm_term=the+real+number+line+worksheet+answers PDF link annotation
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/divasupitewuse.pdfIn PDF document text
    • https://sasofisapen.weebly.com/uploads/1/3/4/5/134590640/topemikezavaliz_lugumanowosime_dazomekatu.pdfIn PDF document text
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/8b715c518b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_5f88aa17a5704.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/ee6626f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f9e1c81209d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f879c712c97a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5fd64e13140c2.pdfIn PDF document text
    • https://jiparebifipi.weebly.com/uploads/1/3/4/6/134638028/3249803.pdfIn PDF document text
    • https://gozikiri.weebly.com/uploads/1/3/4/4/134493270/6179674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424405/normal_5fab8c0141490.pdfIn PDF document text
    • https://kimumowo.weebly.com/uploads/1/3/4/4/134480515/437c59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4f4f61e25426e12f1f8e/1606373200837/blackweb_shower_speaker_manual.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_off0000b1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D4 5168 bytes
SHA-256: d92de7172f96a3d8de1758384881f73ccd63ad54f7c15da03d3b3c26954b0075
font_01_sfnt_off0000c34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC34C 10104 bytes
SHA-256: cee7c96b654b2ac14b068cd8797a1c067d70f261fef09e68ffe1d85f890e56fd

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