Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3ab14eeed01689…

MALICIOUS

PDF

66.7 KB Created: 2020-11-21 01:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cccc94cbee43474c7f3a4b5836e8895e SHA-1: bf56f3591ffee7eefb105f34cf601a175a2e2a16 SHA-256: cb3ab14eeed016894cc8566d40b6057e9b7f0a8799e7d091b601a5634f7de70e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The primary malicious URL identified is https://trafficel.ru/123?utm_term=soul+ties+the+unseen+bond+in+relationships+pdf, which is likely used to redirect users to a phishing or malware-hosting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/123?utm_term=soul+ties+the+unseen+bond+in+relationships+pdf
    • https://depasosuva.weebly.com/uploads/1/3/4/4/134483816/gunenejulilobaw.pdf
    • https://fozegujulukov.weebly.com/uploads/1/3/4/4/134459046/63be3caea8.pdf
    • https://cdn-cms.f-static.net/uploads/4383586/normal_5f9f69e8b0aa6.pdf
    • https://cdn-cms.f-static.net/uploads/4405208/normal_5fa537f232d13.pdf
    • https://cdn-cms.f-static.net/uploads/4414353/normal_5fb84aeb8598e.pdf
    • https://negalunuz.weebly.com/uploads/1/3/4/7/134702004/413499.pdf
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5fb578a1000cf.pdf
    • https://cdn-cms.f-static.net/uploads/4444866/normal_5f9dcf264d019.pdf
    • https://cdn-cms.f-static.net/uploads/4481527/normal_5fb4bac125389.pdf
    • https://cdn-cms.f-static.net/uploads/4472213/normal_5fa92ea19acda.pdf
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5fa387257052a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/voxulija/24757234873.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c73b.bin
3e514026876542ffbdd6b2cf981e2a593291678b85a145d28380dffd9df89216
pdf-font-stream PDF embedded font (sfnt) at offset 0xC73B 5372 bytes
font_01_sfnt_off0000d969.bin
6d9d8ba6d632b38cf117a1d616f8b903d746f84b3bedd38bb84d17c82daa6b1c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD969 10776 bytes