Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c209b018d00d983…

MALICIOUS

PDF

66.8 KB Created: 2020-12-27 04:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ee2fc6cc276b971480108f1b161b7bcb SHA-1: 9a895f2b4a4bc7ef7f099b1d17dce84575ccf19e SHA-256: 3c209b018d00d983b7b2cc2805a400106a48ae5270f851727316878c4df87538
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files, suggesting a link farm or SEO poisoning tactic. The primary malicious URL identified is https://trafficel.ru/123?utm_term=the+study+of+counterpoint+pdf, which is likely used to host phishing content or distribute further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/123?utm_term=the+study+of+counterpoint+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f90a637c1883.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/8400682.pdfIn PDF document text
    • https://gimalijuvilonur.weebly.com/uploads/1/3/4/6/134619020/3009455.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8cc0db80-8609-4cbb-b3b5-2cdc6293e8d6/96293604904.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/1800150585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d325105c-74a4-41f7-a35b-9818d6a9e0a9/fizojeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22824f1e-61d3-4cde-b9b8-4fe994a80815/tiwesad.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/fogemoroxavasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca44231-5fd2-42cf-912a-7b2cebca62b0/86607669107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8923b78e-dd91-4e2e-bf01-afcb76644128/32137627639.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_off0000bc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC60 4932 bytes
SHA-256: e8b807b2266518a91de029746761f1ae900755906e30b137b780bf6f7958df38
font_01_sfnt_off0000cd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD23 10500 bytes
SHA-256: e887a0bdc73649ff30e55f282f3c69a8b86bf5f918a10fb14fc5b69e10ffb598
font_02_sfnt_off0000f0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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