Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6f6ee5ec1e23cb…

MALICIOUS

PDF

78.7 KB Created: 2021-04-03 15:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 064849652486700a2740f6b8656340e7 SHA-1: de0418df92dcbd897c09c41b86ab610e1f7d9892 SHA-256: 5b6f6ee5ec1e23cbee5f1415ab2e71e06792a37c72c544465309fc322f4f0416
156 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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://pelibifir.ru/strik?utm_term=what+do+you+do+if+your+washer+won%2527t+spin PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377095/normal_5fdf11ae5ac02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486778/normal_5ffa80be30e6e.pdfIn PDF document text
    • https://migirebunimalab.weebly.com/uploads/1/3/1/3/131383914/xixavetakuno_diwazugajag_kufefol.pdfIn PDF document text
    • https://vatosulutat.weebly.com/uploads/1/3/4/5/134587817/4da13a.pdfIn PDF document text
    • https://pafovawulawagi.weebly.com/uploads/1/3/4/5/134581771/519109.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_5feeb74faf461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_5fea0bb91f2a8.pdfIn PDF document text
    • https://winuvepesedop.weebly.com/uploads/1/3/4/4/134476249/4552405.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372972/normal_6003bd4be87a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7023e3be-bce5-4353-8787-891c100a66ec/tri_state_bus_schedule_highland_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1088bfd3-6aae-4d2e-9aa5-f1b36946d41d/2010_lexus_rx_350_used_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2585d92-5fb2-4382-9f6c-8ee3b7bd9baf/88172767976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88517ed5-d75e-4db2-a194-e2e39b651d50/lunejepetevemima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d879705-fd20-4ee8-86b1-7e3263c3e045/54218460191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/477afe81-75b8-4aff-aa7c-715f4d018cd7/zizajofiwugenozasimilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71c46c3-7a69-4c61-866f-2a25620f52bb/vulifoletopedogun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6544f3b-83c5-48b4-8e29-28222982fc23/shark_navigator_vacuum_maintenance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809668a5-2b7e-4247-a0d5-727f91ebd6bd/xafobarufimojitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b24e62f8-acd7-4621-9cd5-2b5a241fcfc6/course_2_chapter_1_ratios_and_proportional_reasoning_test_form_1a.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_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 5340 bytes
SHA-256: 2b2d77cdf41d93ee95439389d1aa974fbf26a685a8e1fd3ead8854625b74d820
font_01_sfnt_off0001075d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075D 10676 bytes
SHA-256: 39b716fa5cc8300698af833a6714a8b71ee154bb1e88f7b2ddbd8b643c4b2816

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