Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d37c66784565237…

MALICIOUS

PDF

175.7 KB Created: 2021-05-26 06:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 73e38c2317748d7dccd791daa2056025 SHA-1: 32885216241999f294670aebbe3ae6cba5a244ca SHA-256: 3d37c6678456523785dab4393a6a222dc802402ceac99f35d5892457585ac95c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that redirects to a suspicious domain, likely to host a phishing page or a second-stage payload. The document body, though heavily obfuscated, appears to be related to the embedded URL's query.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=what+is+the+gospel+message+of+salvation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379032/normal_5fca31e3c37e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_602c41e94f3a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394066/normal_5feeaee55c39d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403407/normal_5ffa241a14b4b.pdfIn PDF document text
    • https://bumifinanefisan.weebly.com/uploads/1/3/2/8/132814282/8063998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486981/normal_5ffaf1002592f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447663/normal_605df98ef41cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_6032cd5b63346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481528/normal_602b539e980d4.pdfIn PDF document text
    • https://napujokid.weebly.com/uploads/1/3/5/3/135339673/1631696.pdfIn PDF document text
    • https://linusakeziri.weebly.com/uploads/1/3/4/7/134747074/gexix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482190/normal_5ffc5799a8d88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502920/normal_600e22e534119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_606005f233742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_602882860f95b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383921/normal_60543ab12428b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504047/normal_6062d0753a1b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420237/normal_60049f8b91b4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410731/normal_60414588eb996.pdfIn PDF document text
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/jalivewiribeteseme.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/zuses/93084967870.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/xuxuri.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/83877695020.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_off0002723f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2723F 5292 bytes
SHA-256: d634baff6f89dd149c33e73254aecbe14a670692b467a65aac44c089f1367b2d
font_01_sfnt_off00028434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28434 14416 bytes
SHA-256: a16ef56dcda52d443a2b16c21cea75002b12840041186d5c4f314e25e14d5fe8

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