Malicious PDF — malware analysis report

Static analysis result for SHA-256 b56d1001a688358e…

MALICIOUS

PDF

73.0 KB Created: 2021-06-07 13:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b7cb2de93f61db5217c9f6ff3fed4cf8 SHA-1: 4ccf52fcdb495f641f05c1da681b7899f282b254 SHA-256: b56d1001a688358ebfb643177ef8c3fd9e76758eb9334545430ead7b99b30800
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malicious payload delivery attempt. The PDF contains numerous external links, suggesting it is part of a link farm designed to direct users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and the presence of many external URIs strongly suggest an attempt to redirect users for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/pbw?utm_term=essay+on+advantages+and+disadvantages+of+internet+100+to+120+words PDF link annotation
    • https://sudiseva.weebly.com/uploads/1/3/4/4/134470115/wopalonowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485451/normal_60571e9d385f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_600e9cb137c95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479237/normal_600738cfec957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405650/normal_6028d0cf8d20a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388406/normal_606a12a25e2ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404503/normal_5fe64ef10809d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412606/normal_6033e4a269d4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454300/normal_605f56cc85f56.pdfIn PDF document text
    • https://xafosaxit.weebly.com/uploads/1/3/1/8/131859261/9695147.pdfIn PDF document text
    • https://gunoserikufetof.weebly.com/uploads/1/3/4/3/134360264/vebupadi-nururoxafoj-jodivikuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_6036302998104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486199/normal_60352e3b71ef7.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4380393/normal_60b3ee6155101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_601951bd33ea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_601a69142111a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501198/normal_60488f22e603b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_606d9b5aa8546.pdfIn PDF document text
    • https://xaxidotuviw.weebly.com/uploads/1/3/0/9/130968933/wesagado-romanezotasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421461/normal_6012541a52477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_60632c51151d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_601a002839cd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_6051297c47330.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 5580 bytes
SHA-256: b9706ca642850df7344626570599c945dc3e9b3a8b99d03e381c223d837070b0
font_01_sfnt_off0000f48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 9732 bytes
SHA-256: de56e425a37091d8ca9d7efcb14ab205679ee41e279061abf0b4b77990442eb5

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