Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26f860e9cf3bdc2…

MALICIOUS

PDF

65.0 KB Created: 2020-12-14 04:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d8e57b9d7ea3a7429b9e835ad7a0520b SHA-1: 16635f5b701c94b454ae5c6b1b8bcb43480d4faa SHA-256: b26f860e9cf3bdc2016165209a0a760b27daa39a18e10c891054deb7399744a1
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The embedded URL is `https://traffine.ru/strik?utm_term=yardi+voyager+training+manual`, which is likely used to redirect users to a malicious site. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/strik?utm_term=yardi+voyager+training+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5f95869171ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5fba34dd52f3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489414/normal_5fcf5e872af04.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/gofiguj/50213655049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03fb4007-d0ba-4daf-b477-6a49ae90c4e4/5_string_bass_scales_for_beginners.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d46c1c59a74bd98caa43/t/5fce6304920f47545bc73b97/1607361285148/loopnet_nj_gas_station.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/how_to_search_a_scanned_document.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/73161334174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f61e7fd-cfd4-4b41-b500-ba1c7b6c68d7/cae_exam_practise.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/javascript_submit_form_ajax_without_jquery.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/xezosojibutikefug.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_off0000c203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC203 5092 bytes
SHA-256: bd3142f0176e48c634e915be69fce5579cacfd2966545308cee0abcae77e0eec
font_01_sfnt_off0000d352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD352 10772 bytes
SHA-256: cd5160479f03a73524ae5732d3a7c66ee9ecc59f3431f280b3db0e3a762ff1b7

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