Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e6ce45ec186225…

MALICIOUS

PDF

87.7 KB Created: 2021-04-26 04:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5e8b8c9f49abf93e7aa6eca9c53c1961 SHA-1: f93450fadc22cf91ac1ff82f3fbb9365b81f48ee SHA-256: d7e6ce45ec186225bfa87203becc36c6a51c4b7ae3c8bec173bb28d42bb05eb5
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable hosting services, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The embedded URLs and the PDF structure strongly indicate a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/strik?utm_term=intellicharger+new+i2+lights+blinking PDF link annotation
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/pelonatovuro-demusolonebuzi-xowogedipul.pdfIn PDF document text
    • https://fofexajadovobu.weebly.com/uploads/1/3/4/7/134711713/732ca792d87.pdfIn PDF document text
    • https://rutobugexamaxip.weebly.com/uploads/1/3/4/5/134508198/55d421695c6.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/uViQhaK/92359220553.pdfIn PDF document text
    • https://cdn.sqhk.co/xikotoxerov/Fjbhhjb/reported_speech_affirmative_negative_sentences.pdfIn PDF document text
    • https://cdn.sqhk.co/poxosafixe/cHYbcge/87753206544.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/cMKzifx/business_process_management_software_microsoft.pdfIn PDF document text
    • https://lisudite.weebly.com/uploads/1/3/2/6/132682892/1089217304230b1.pdfIn PDF document text
    • https://dozetiwe.weebly.com/uploads/1/3/1/8/131856451/9947141.pdfIn PDF document text
    • https://cdn.sqhk.co/gobisurav/didNjdl/dance_classes_for_toddlers_el_paso_tx.pdfIn PDF document text
    • https://kekorozonositen.weebly.com/uploads/1/3/2/7/132710750/bd12c64.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/ba992fe2-4729-45bb-a041-ea7ddb0259af/wesugibutoxopenosado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/168ea3be-702f-4aff-9060-656171926457/21996849879.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/witexurekumajire.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/fajegexovagudoxaliwuki.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/medicare_levy_exemption_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/xakuzuzixig.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/aptoide_link_na_descrio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1466c5df-5cf0-4b5d-a8bd-546d3574a0b6/rockwell_versacut_4a_3-3_8-in_mini_circular_saw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e71f0ba3-677d-49e8-b7cc-d04d6dbe53ad/stihl_025_chainsaw_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e53e681-e8fb-42e9-a159-480d2d599e6f/wolarusunanafig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db80d0a8-2586-4ca9-bc44-3a7ef4c6150e/how_to_hook_up_a_digital_converter_box_and_antenna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67417dd-8165-410b-a368-ca2daba0d392/python_manual_free_download_3.7.2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9754a3a0-ba06-49ab-ba8b-6d14cf14129b/american_stories_a_history_of_the_united_states_3rd_edition.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_off00011385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11385 5424 bytes
SHA-256: 8a5b1a13bf9892307273a567ba76f44622fad852def02835fa7683408721b2dc
font_01_sfnt_off00012607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12607 13756 bytes
SHA-256: fa4413249e07324af5c4a795c5ffc4d1e08325c903424636ad10877b90a3f128