Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4cad6900a170f3…

MALICIOUS

PDF

61.8 KB Created: 2020-12-21 08:24:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 099ffd05431d1748a7a897b01c0e379b SHA-1: 6217721be0ba75840c5184d8396947ef035f322a SHA-256: 0e4cad6900a170f311f338e02ede5e0b4fe6a86ebecd7d7911e54a40f15ca157
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a link farm designed to host numerous other malicious PDFs. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a clear intent to direct users to harmful sites. The ML classifier and ClamAV detection further support the malicious nature of this file, likely used as a phishing or redirection lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=drum+set+price+in+sri+lanka In PDF document text
    • https://xakukanezo.weebly.com/uploads/1/3/4/8/134898234/dovot-sowew-wifer.pdfIn PDF document text
    • https://muzokive.weebly.com/uploads/1/3/4/4/134498707/ba7966.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/jefazaxal/holly_springs_national_forest_hiking_trails.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce1bd89-74ae-4bb4-9dc1-26da644c24aa/pearson_prentice_hall_algebra_2_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d0f746-fc95-462c-bd60-279250ee014b/dna_replication_review_worksheet_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf268951089318d83ee97c/t/5fdf793f0f6c913d440491e5/1608481088070/free_after_effects_templates_wedding_invitation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6bdebb3-077c-4ef0-b3ec-e90a85564fca/precalculus_9th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/fulibatax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d452fbc6-d5eb-46d7-9e7e-4ca66906e328/devore_de_solues.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/66239657704.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb205e8e827d4288adb3/t/5fc2ab025147b148048a50d4/1606593283908/python_dictionary_with_multiple_identical_keys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21d61c7-0b88-4210-9a46-c19b01beb3c4/golalafodupepoxexidise.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/78589906177.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/cadbury_5_star_nutrition_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3347f2-9ca3-45d9-9fe6-06735e8f69d4/dispositivos_electronicos_activos.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_off0000b32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB32E 5144 bytes
SHA-256: b34fa2b17d5dd9bd67ccda20f0a0cebc10735a4f45c8478837f20a1aae4c9291
font_01_sfnt_off0000c49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49C 11388 bytes
SHA-256: fba77304f71354c845fc0cbe9ab12b236060cc18ff2be0749af65c41d5a78733

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