Malicious PDF — malware analysis report

Static analysis result for SHA-256 da59c7792f29e498…

MALICIOUS

PDF

75.0 KB Created: 2021-02-25 17:01:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e83840cc8f02fb5a3f6d6247bece2e95 SHA-1: 251cd705b3e99ec7fed5c62121d61a3da5650a16 SHA-256: da59c7792f29e498946d1cde35a5e529b90d296b2da536c90be7d1315072f6fa
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document's primary purpose is to drive traffic to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=which+bible+translation+is+closest+to+the+original+greek PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465131/normal_5ffd7b6c6c601.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fcd7ab3a7bfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489975/normal_5ff0eb4488b52.pdfIn PDF document text
    • http://fastdonwload.space/44996512101sshyd.pdfIn PDF document text
    • https://nunigagajil.weebly.com/uploads/1/3/4/7/134751499/6623802.pdfIn PDF document text
    • http://shoppingyxplus.xyz/sitiratakojojaum28p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448713/normal_5ff41b1aef0d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473622/normal_5fd6780138763.pdfIn PDF document text
    • https://malodarugamizo.weebly.com/uploads/1/3/4/8/134853004/zegedipiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_6009fe28c213a.pdfIn PDF document text
    • https://vewenaloviriwu.weebly.com/uploads/1/3/2/8/132816087/2676351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451025/normal_6027555caba67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492286/normal_601dda13f3bd2.pdfIn PDF document text
    • http://lg-supportteam.com/skylanders_characters_pricemyb1j.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/wewuxuviwar/times_new_roman_font_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/singular_and_plural_nouns_worksheet_1st_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/rebanimoletuwokef.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_off0000e77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77F 5276 bytes
SHA-256: f9c35197d1fd5b3083eaae88f7e4779a5d23fd564048e46389d2858a7f54ccd3
font_01_sfnt_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 10804 bytes
SHA-256: 67d035a4ecdd6d1651d3cdd942c23ef0d74321f3060ecdae3be128fd5713739f

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