Malicious PDF — malware analysis report

Static analysis result for SHA-256 3119de4ad821d7c3…

MALICIOUS

PDF

75.6 KB Created: 2021-04-06 22:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2417be71cca99f5a7ff169070ad8a0b4 SHA-1: 4a618688c53e43daaf8aae84dd1e085449c2d392 SHA-256: 3119de4ad821d7c31042a6021d61418359df23aadceeb3ec8cb4b86b7895a2ad
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO poisoning attempt. The primary malicious URL, 'https://bologen.ru/strik?utm_term=what+are+lines+on+a+graph+called', is likely intended to redirect users to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://bologen.ru/strik?utm_term=what+are+lines+on+a+graph+called PDF link annotation
    • https://siridadujaxata.weebly.com/uploads/1/3/0/9/130969300/vetuzafo-wewokatoxinerox-nopasatirukup-moxalamok.pdfIn PDF document text
    • https://cdn.sqhk.co/nedivixozu/hBjg6gc/94516457137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_60697f66ed7a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_602b2993e1832.pdfIn PDF document text
    • https://dizalojowu.weebly.com/uploads/1/3/4/8/134866254/defbbe6ab.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/XdezhaU/archer_the_hundred_years_war.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388613/normal_6025da4ec54bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426675/normal_60253604daf4d.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/wqUhigi/gifipidaxela.pdfIn PDF document text
    • https://zuwuloju.weebly.com/uploads/1/3/2/6/132681456/4334178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463286/normal_6009e11f5760a.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/jazuravazaguz/antivirus_android_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/what_are_the_12_steps_aa.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/bagoferirawowumetek.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/entrepreneurship_development_and_business_ethics_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/jusovitadokakapakogatilaw.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_47b64cc1baae49caa2fbb82aaff182b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megelugik/bipuvapodepoxosijamez.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/that_evening_sun_summary_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/left_sided_neglect_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/zibezajaxavosupevok.pdfIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_c44bc706844a4ccab2c21e53cd9bab41.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/45276437837.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_off0000e72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72D 5348 bytes
SHA-256: a97fd6c777dc55ac6ad520bda832d69f6da1c0be5c37936a6b68c4a60b6fc011
font_01_sfnt_off0000f961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF961 11144 bytes
SHA-256: 688499bcd961e8494c8fc2567ac02dfeabcd06ebfeedaad202fe112c5b5083a2

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