Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd606cf550ff682…

MALICIOUS

PDF

67.4 KB Created: 2020-11-23 21:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c8fd7b74ea579115e6473331ba3dd99b SHA-1: 91e71ce0b39301dbac93de948b62081ad87d64f6 SHA-256: 9fd606cf550ff682ccee7517d38f5efc015c96ccd4118fc78323b3385239f2cf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to Weebly hosted PDFs, suggesting a link farm or redirection scheme. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent, specifically identified as phishing or a trojan. The document body, though truncated and obfuscated, contains references to 'Tibco gems download' and the authoring application 'wkhtmltopdf', aligning with a lure to download potentially malicious content.

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://trafftec.ru/strik?utm_term=tibco+gems+download PDF link annotation
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/7414141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5f91ec5ed474a.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/095a3830.pdfIn PDF document text
    • https://zokejiwiperasuk.weebly.com/uploads/1/3/4/6/134668939/bekubago.pdfIn PDF document text
    • https://losepubi.weebly.com/uploads/1/3/4/5/134502138/7bef4d9544cd99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458622/normal_5fb88fd173dce.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/satuf.pdfIn PDF document text
    • https://dojenamolusojow.weebly.com/uploads/1/3/4/8/134868247/3421844a68a4.pdfIn PDF document text
    • https://fobolobal.weebly.com/uploads/1/3/4/3/134317950/limowupokaj_dadunuwero.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/sixenogafopoj/polycab_cable_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/tarezemisorokopevalozevu.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/tipos_de_inteligencia_test.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/anaconda_python_3._7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/2007_hummer_h3_manual_book.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_off0000cc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC21 5344 bytes
SHA-256: 5dd54f11f1b2534b46ec6014270b953a25ce67e2bfbc8ae5b3ffe64fa8e86916
font_01_sfnt_off0000de4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4E 10192 bytes
SHA-256: cbda3795b393bc1331395b8c70e0b124f3b8f191ff4fb59ae31d4db817d1b70b

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