Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6d9f9f6ea11e1f…

MALICIOUS

PDF

77.8 KB Created: 2021-03-12 03:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9d6f9fccb6cba25b41058f083a0002d0 SHA-1: 09ee7eb0c70b89fb78d3b15740e2fb961edd0746 SHA-256: 2e6d9f9f6ea11e1f821b03bd48bdc7592786a29c71677266c9c791f65a150207
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. The document body, though heavily corrupted, appears to reference a 'repair manual' to disguise its malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/aws?utm_term=logitech+z623+repair+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393362/normal_5fef524bb759c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_603ce80590d74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385427/normal_5fe5c51f1dc05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_6044218d143ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423166/normal_5ffdb161eb59f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469634/normal_60337bf3c1876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_5fea0a38340ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477167/normal_5fda8b09c9b6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378830/normal_6002d4884236d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459621/normal_5ff899d3a659b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424682/normal_5feba88a3a023.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422382/normal_60066ceea9105.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/pulujolatepuv/53386489282.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/dante_s_inferno_john_ciardi.pdfIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_bdd66d3f01f7440883c135d724bf7386.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wekibik/xilipozepuxuj.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_873b530c49fc498e967c48580cb6a620.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/brackets_editor_free_for_windows_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/nowaximujegatelametiz.pdfIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_c7f6daac0de34886bb7a2d4a449bc33a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vovuzize/ordinal_numbers_esl_sheet.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_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 5612 bytes
SHA-256: 1227001ccd89d91ee7b688769d15f8ebce21f3a1788b017097629747046746d3
font_01_sfnt_off000104f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F7 10800 bytes
SHA-256: 04ce98ffbc322b07b310854293ed93d9c826ecb38b21deb41852a4ec98f8b1be

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