Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab483124c778c388…

MALICIOUS

PDF

75.9 KB Created: 2021-03-14 19:59:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 86a39474af6a9077a6a294d4cef8624a SHA-1: b50100a783e0252b45e865e1cad82a14c0fece24 SHA-256: ab483124c778c38807326d9ae46e515befb57c6809e0c3783d3af92979cf7336
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains a large number of external links, with one suspicious URL identified as a potential entry point for further malicious activity. The PDF's content, though heavily obfuscated, appears to be related to a link farm, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/award?keyword=atingerea+lui+juliette+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494451/normal_5fe8ab14e7a35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469852/normal_6011a58e3d9e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461525/normal_6042223e2eb2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487432/normal_5fe9ace5e729c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379731/normal_600a44ad832cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457572/normal_602018d9b65bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448124/normal_602ae007bbf9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_60122a327c549.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://70745723-7f4a-4dc7-98be-95bdce43cd82.filesusr.com/ugd/67bae7_506789d507d8428aa2e19cb4540df43f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/fresnel_biprism_experiment_viva_questions_and_answers.pdfIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_f7ee90219f174a2d8cefc93b8e8cc8a4.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_ce818e870f7c46f1ad2806fb0283d82d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b184236b-9b69-46ca-8ecd-83a07c308b9d/what_is_the_example_of_physical_structure_and_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b9cb35c-c645-4139-8e32-73b03aeb3487/sozebenilefamezud.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/bryant_furnace_model_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/the_balanced_scorecard_kaplan_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/simple_service_agreement_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/wulobugefajuvazaxebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d6d8aa-7067-4c43-aa9e-bf051c12d318/multiple_intelligences_questionnaire_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/77667605813.pdfIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_13c30f8c073f4950bd8ea7c3ed8f439f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee29f2a1-a24c-40f6-b28d-cda03a99fceb/epson_xp-310_not_printing_all_lines.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/73308294210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c267f8-1661-4dc1-b654-7ffbc5397bc8/55551496423.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_off0000e0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F8 5096 bytes
SHA-256: cf94bfc700ced515383d8f41691d89168a7ecffe0dab557c16459b79a93517a1
font_01_sfnt_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 15076 bytes
SHA-256: 9e408bd87b34e813b3177ac775d65e4ba6d5f9bb648004f690ccca09f70b8c10

Open this report in the interactive analyzer, or submit your own file for analysis.