Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d40e1877252eeb…

MALICIOUS

PDF

79.3 KB Created: 2021-03-17 06:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6a20e6634b4d6658fe0bdcf2ef307bf2 SHA-1: 595c552ae3dedff304b8f0c82a3a9a24f75b425d SHA-256: 07d40e1877252eeb6ad822e69423fa9ace140b359df44828e83ef944d522ace6
254 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. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://yafferge.ru/wix?keyword=coda+2020+rotten+tomatoes In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_6c0e78bfe6c4460e9efb1d3b50f814a8.pdf?index=trueIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_39b681d3dc2146d3add856690ab4eab6.pdf?index=trueIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_b9e6714bd4534fbe9c621e3cde1be31b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/vavewodakuxadigomegugud.pdfIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_7f72301f2b4147d3a069d92eac8991c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7808b776-26ba-4b4b-bb64-84a413bb0dd4/bunker_hill_security_camera.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/23715252942.pdfIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_f8b467cda30e4ea0835c3195fcb5f966.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d65d1ba-f1b6-48db-9682-dfaf91d7eb3a/mewuru.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/are_there_any_recalls_on_the_2018_subaru_forester.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/95555005557.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/how_to_treat_eating_disorders_in_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/52225508158.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/cisco_anyconnect_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/bright_line_eating_recipes_breakfast.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_af48cf07d9b94fd5b34b4e7bbc36d44d.pdf?index=trueIn PDF document text
    • https://73b3f487-90f5-41a6-bf44-750372f72efd.filesusr.com/ugd/39e8d0_993c9558551e406eb7f921918f30d5ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e2f6adb-47c2-4f08-bd15-168d1b729d92/how_much_toto_toilet_cost.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_e2e76cd8fdf84e5b92633e25fcc1559a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosevud/whirlpool_washing_machine_error_code_f6_e1.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/fikuludagu.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_off0000f917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF917 5120 bytes
SHA-256: 9a4775ccca1c251f48f7084183adb14b36e3d34ec1cc68c79762b6fe082b582b
font_01_sfnt_off00010a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A60 10864 bytes
SHA-256: d8f7018182757f2c0664b9c0ae46ff7c2ce331fd0666bb2005a9bc8ffcddf9a5

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