Malicious PDF — malware analysis report

Static analysis result for SHA-256 162b0ee255a26fc5…

MALICIOUS

PDF

62.1 KB Created: 2021-02-22 17:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a3b6a8250eaffb93f14474d62530433d SHA-1: 1e19eb183cad3101febbf70cca9e83e91853cbf3 SHA-256: 162b0ee255a26fc547d27678bfb8d593d5b41c302c9b5f094ba8a4aa13d3867d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/wix?keyword=lesson+15+writing+linear+expressions+answers In PDF document text
    • https://static.s123-cdn-static.com/uploads/4504568/normal_6008b8135fbd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492600/normal_6002213a9a707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503050/normal_5fd6c87963396.pdfIn PDF document text
    • http://1pokypki.website/36685546525wesgv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466366/normal_6031d8eea563f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_5ff13d3359745.pdfIn PDF document text
    • http://difuwikikum.iblogger.org/febovakukituxof.pdfIn PDF document text
    • http://easylearning.space/85035932259mid6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384167/normal_5fec13b931b4a.pdfIn PDF document text
    • http://wobijamitiz.iblogger.org/adamski_george.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/lopadivupudexa/english_story_film.pdfIn PDF document text
    • http://jominata.rf.gd/vasozibodosifogewusujanaz.pdfIn PDF document text
    • http://xikebivulusures.rf.gd/cause_and_effect_worksheets_grade_4.pdfIn PDF document text
    • http://zusobudem.epizy.com/nopisager.pdfIn PDF document text
    • http://pitefabe.epizy.com/82594017926.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_off0000b8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A7 5264 bytes
SHA-256: bc422f3b49c7b7abe210463b39d300e26da10d4892ed397e662938d434cbcb16
font_01_sfnt_off0000cac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC1 9628 bytes
SHA-256: d75012433664e177b0afbd9a96ed58952fc9359b0ce3571dc6917de24671f04d