Malicious PDF — malware analysis report

Static analysis result for SHA-256 004224a5a697d95f…

MALICIOUS

PDF

58.4 KB Created: 2021-01-09 17:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e7c5c58cbe64fbdc142c0a8677689004 SHA-1: 221960f27a69841e2b8ca015265c3e701ed33fc3 SHA-256: 004224a5a697d95f576e2d49fe02525fe51d20d0b5a0768c474b608386b7038f
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external websites. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt. The presence of a link farm and the detection as a 'Pdf.Phishing.Trojan' by ClamAV strongly indicate malicious intent. No scripts were extracted from this sample, but the document structure itself is designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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.
  • 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://traffking.ru/aws?utm_term=materi+tentang+akuntansi+manajemen+pdf In PDF document text
    • https://zunepijubu.weebly.com/uploads/1/3/3/9/133986973/pivogefe_derode.pdfIn PDF document text
    • https://desebenenoda.weebly.com/uploads/1/3/5/3/135348916/warasibafu-ninan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478132/normal_5fe93c19cba71.pdfIn PDF document text
    • https://wexipemeb.weebly.com/uploads/1/3/4/8/134860193/goferobetifeji.pdfIn PDF document text
    • https://patekakedosejot.weebly.com/uploads/1/3/4/4/134479085/wenuvubumasis-faregod-kanofawemurul-kirizekibipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5fe9ddea5389a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_5fb772f01be28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5fa2bbe563487.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470696/normal_5fcdd2e121191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445729/normal_5fdb97e3459e6.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/retisovojor/arietta_arnaut_daniel.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/backup_android_contacts_to_pc_free.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_off0000ab9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9C 5476 bytes
SHA-256: c54c3589e35f935a5aa34011c9460010c61939b034dc4c4b44a8001509df4a0e
font_01_sfnt_off0000be3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3F 8912 bytes
SHA-256: fb22d198b359f730f3d3c26c5b48c4f8be35df03142ef3febd0453a14c1f3c2b

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