Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c72fe54e8157a19…

MALICIOUS

PDF

67.5 KB Created: 2020-11-27 07:07:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 84b035e88a881f0502d3af5ba4023225 SHA-1: 07d58e14796c6c4d091e4d33672d19b788069504 SHA-256: 2c72fe54e8157a192af160a8c19313471b8d95684bfd236d6f974cd35527772f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing lures, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior point towards an attempt to redirect users to malicious content, likely for further exploitation.

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
  • 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.
  • 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://trafftec.ru/aws?utm_term=case+interviews+cracked+pdf PDF link annotation
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/paxuvudonarisa-kewaviludoseja-mowolifofubem-noxuv.pdfIn PDF document text
    • https://riwaduzubef.weebly.com/uploads/1/3/4/3/134319835/mupixopavipi_didixodasa.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/dusined/java_file_from_server_example.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/hexagonal_prism_cut_out_template.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/earn_to_die_1_unblocked_6969.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/algebra_2_common_core_curriculum_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/39539670115.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/mofizomodadesejufoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6fc76ce-50e8-40af-a41e-8e878fca78fe/93313927383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf9fabd-20dd-4894-a57e-c349759f90b8/folikelezokosufosorevolup.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/83356052294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a293c8-ae93-4409-965f-8f0e68bc6f65/suzy_and_sam_moonrise_kingdom.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_off0000caf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF6 5236 bytes
SHA-256: 50b7c7c7cd38ca44ed99e631c374baa459fc8410138934f4ad99c66673dde05f
font_01_sfnt_off0000dce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE9 10788 bytes
SHA-256: a2547225eef65d82c0d21fe2b20f1c7790979d7d667678afd8ef76736c62222e

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