Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4af6f5fa01249b…

MALICIOUS

PDF

115.6 KB Created: 2021-05-26 07:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a46c99b67f65a2598696169df8ae49c9 SHA-1: 726a0eab41c8bc3ba389f2868291f7c048ce38f9 SHA-256: 8b4af6f5fa01249bfe87656b1831d59e96c5f78dc097ff5d0f48f567e19fbb2c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://soxebez.ru/strik?utm_term=pokemon+in+hindi+season+13+episode+28 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462344/normal_5ff3aa7c3e1ca.pdfIn PDF document text
    • https://kenojitoxudu.weebly.com/uploads/1/3/1/3/131383977/vagodeten.pdfIn PDF document text
    • https://gipoxafevipetim.weebly.com/uploads/1/3/1/3/131398102/jixemanup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457279/normal_5ffe9a01907c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_605fd3e50bbcd.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/desenaz/xowaf.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/pevodidejefogalovutulu.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/4218985934.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/the_price_of_the_ticket_james_baldwin_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/11963564757.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/how_to_write_a_letter_of_interest_for_a_job_position.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/type_a_aortic_dissection_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/betting_raja_full_video.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/54200839794.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/problem_and_solution_text_structure_video.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/iron_man_1_transcript.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A47 39004 bytes
SHA-256: 91e3188820ddc681fbea3132aafec85ca69276319922653829e28a59dfb58dfd
font_01_sfnt_off000184a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184A6 5676 bytes
SHA-256: 79937f1fd404798f0d5b5b712bc33257020c2cdacadba472abfa9a4eed234477
font_02_sfnt_off000197da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197DA 11968 bytes
SHA-256: 3b9fd1ed4c0f32a0a4abef98681de11193e8b71b2067b8c4d89186fa3ffc2cb3

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