Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcd2cb8b35d55fa…

MALICIOUS

PDF

77.0 KB Created: 2021-04-25 07:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 565eb177d4f108b56b80e6026dd82323 SHA-1: 8f5439c4bc8e14fcc0d6902e5abd6cf5d48d774d SHA-256: fbcd2cb8b35d55fafdb98e0d3a8a7dc64a2128518c82cd81f33696e32dfeb54a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/strik?utm_term=how+to+have+spiritual+discernment PDF link annotation
    • http://vipmanmarket.space/dwell_magazine_onlinee8gtb.pdfIn PDF document text
    • https://dotawipe.weebly.com/uploads/1/3/5/3/135323210/c461487e7.pdfIn PDF document text
    • http://zasufigonibat.getenjoyment.net/59284443037.pdfIn PDF document text
    • http://sis-paypal.com/nirefipotukotenp6ea.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/abecedario_en_ingles_y_espaol_pronunciacion_y_escritura.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://s3.amazonaws.com/fevobelijogal/nipubit.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/maths_logical_reasoning_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/non_chronological_report_for_year_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be726e6-3976-487a-a304-c81fb53db35c/jerurepotug.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_a8dedce8e61e42aabc3a75b33512d044.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7382be3-84b8-4b4d-9ead-408f40a497d3/dukukasanuxapolozow.pdfIn PDF document text
    • https://34184745-b1ec-4725-b105-60c94cc90871.filesusr.com/ugd/63369f_9672b6ad1e25470ba5344f571f921220.pdf?index=trueIn PDF document text
    • http://bopisumeku.atwebpages.com/fegesimetuzixizod.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/casio_sport_protrek_solar_watch_manual.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_e8a853954e7e4d6ca81c212def42a851.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/be436e48-9577-4e38-806a-da2d23129f0a/49172613862.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_off0000e068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE068 5308 bytes
SHA-256: a6585ff09ed94785c7e1890edad74a4d282d642dcbf6799aee75e901bc6b265d
font_01_sfnt_off0000f25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25E 10868 bytes
SHA-256: 6690eba0a7e232d710f1fe34df9a81c0a858ce9d33d37726e2891a107e0af3b2
font_02_sfnt_off00011759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11759 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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