Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07bcbc0c32d125e…

MALICIOUS

PDF

92.9 KB Created: 2021-01-24 09:28:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fe9629f84fdd27358146842f36ccab88 SHA-1: dcde6295a50d182f3096baaf1d3768a67a6769cc SHA-256: d07bcbc0c32d125e1f3728eeeed88cb06d41533cf243075edadfb2edbd02970e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=rediscover+catholicism+book+pdf'. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The ML classifier strongly indicated maliciousness. The document body appears to be corrupted or obfuscated, but the presence of embedded URLs and the redirector link strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/123?utm_term=rediscover+catholicism+book+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403143/normal_5fe7d1f21e067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379234/normal_5fec9c9680420.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470833/normal_5fce2a91e9f67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_600ccbc202ec3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420025/normal_5fed9438a235e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444370/normal_5ffeb8b7ef874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482228/normal_5fe82e446c95e.pdfIn PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/fagixakegalilagosesif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499002/normal_6009440c57d46.pdfIn PDF document text
    • https://site-1246216.mozfiles.com/files/1246216/integrate_google_analytics_in_xamarin_forms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448724/normal_5fe50612537d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468296/normal_5fff0703ecacb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447265/normal_600b6ba1a35c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489241/normal_5fe28a0a08ed9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445531/normal_5fdac22ea960e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380379/normal_5fff12059648a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499002/normal_5fdc10e2b49ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380392/normal_5fda8ee7ae58e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365551/normal_5ff66ffcc1251.pdfIn PDF document text
    • https://site-1172732.mozfiles.com/files/1172732/17993268447.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/vipuxafol/guzagub.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_off00012d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D99 5664 bytes
SHA-256: 762770b5cad0d80a426483088c2afadff27fc388d698a2ddcbb5be106f3a1e28
font_01_sfnt_off000140bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140BB 10964 bytes
SHA-256: da313a4b86bcab1f64376eca507ce1445b039b354ab30bf416896eda29cf3d4a

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