Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9941797034f2b0c…

MALICIOUS

PDF

89.7 KB Created: 2021-03-08 10:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0e58fdb37337b4d675e4fac27b99c80c SHA-1: 66b4b2f131bb5c0ac82492b1823b1a5526d1ce42 SHA-256: e9941797034f2b0cda6295f9f73bb56fa5f410c1e33c675e35649b38fc32b004
156 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to 'pelibifir.ru', which is flagged as a potential phishing or malware distribution site. Heuristics indicate the PDF is part of a link farm and is classified as malicious by ML and ClamAV. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/wix?keyword=piano+sheets+roblox+faded PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/77108507-691e-4205-9419-81ce68a6651c/10097220384.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/sulagejudiduwijuri.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/pedejiw.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_42225ccce6d24b60a67ae33e0bc65982.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c55ba12-036b-4763-b650-8f8f69615265/68752375398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff5a464f-8699-46ad-acb5-1fef7729f018/do_the_marvel_actors_get_along.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84dc40b1-73bf-4d9f-a544-5baf7945c18e/omron_7_series_wrist_blood_pressure_monitor_accuracy.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/guxulomuralefawejiz.pdfIn PDF document text
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_7e1425dbb95d4ba087a95674b2128e4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/retisovojor/merger_and_acquisition_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/vitasal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c31c5f-0599-47ba-b11b-6c327174c4ab/amana_washing_machine_lid_lock_flashing.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/periodic_table_groups_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/blender_3d_tutorial_deutsch.pdfIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_28b92cf887f44fadab380999e19f3c90.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/resixexi/apache_tomcat_9._0_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe6c9360-2c23-4360-a79b-995e7de71d79/93891751484.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/86561997022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1021cece-928f-4d41-bd03-eab27836badd/puzodaro.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/aci_302.1_r_15.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/34001193125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34a3e7ae-7d7c-4314-9e38-d5123dc7fef1/76306001127.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/medical_appointment_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/how_sinkholes_form_video.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_off000112f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F3 5204 bytes
SHA-256: 34c04b5f5da51fe60e37eb7438d8d8163c84099b88e0fa33a66022cd4e0ae11c
font_01_sfnt_off0001249d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1249D 16564 bytes
SHA-256: 1747aa46640e44da35b1f024819237dec2ada143441b1e7cb58cb4b725e1da14

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