Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bf6172a0f75b9d…

MALICIOUS

PDF

77.8 KB Created: 2021-04-04 11:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1a47dc86042d952c38c18de98f797ff9 SHA-1: a936756470ff0b2a8f4be44f299ea41815f6910a SHA-256: 47bf6172a0f75b9d767d06a23917082b904b04b41f336f7f3cfec8bd05329618
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users to external URLs. The primary URL identified, 'https://gimoguvi.ru/strik?utm_term=how+to+repair+nordictrack+treadmill', is associated with phishing and malware distribution. The document body, though heavily obfuscated, appears to contain keywords related to treadmill repair, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://gimoguvi.ru/strik?utm_term=how+to+repair+nordictrack+treadmill PDF link annotation
    • http://kigaruzolalo.mypressonline.com/digital_photography_definition_computer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453144/normal_5feafc2568880.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/animals_drawing_picturessvvtu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467043/normal_6015c88ccf4f4.pdfIn PDF document text
    • http://reestr.site/wejonimlndjy.pdfIn PDF document text
    • https://nuxutesinof.weebly.com/uploads/1/3/1/4/131437012/9728535.pdfIn PDF document text
    • https://rixatesar.weebly.com/uploads/1/3/1/8/131871899/698058.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373782/normal_5ffa0d83257a0.pdfIn PDF document text
    • http://fitness1.space/toca_race_driver_2_trainer6621c.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/popogaxamerut.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/2e3a1f53-9e7d-49e5-b112-e178296d6d50/are_technologies_gendered.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/atharva_veda_tamil.pdfIn PDF document text
    • http://futevege.rf.gd/detepikaremisot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d215231-28fc-4d1c-b88e-50dacb45b2f9/alfonsina_storni_tu_me_quieres_blanca_resumen.pdfIn PDF document text
    • http://wuxigukupem.epizy.com/non_profit_organization_bylaws_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d12fae9-1e26-4c41-9902-a421e420b252/55541056755.pdfIn PDF document text
    • http://xokifanubede.rf.gd/fekorulajonofupuxinegap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806c00d0-2659-489e-92b3-b22474bf5460/glacier_bay_bathroom_faucet_repair_video.pdfIn PDF document text
    • http://dixiriruturebul.rf.gd/98023489052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79fbdb77-9d07-43c6-bf10-118f2c343c01/compare_and_contrast_topics_for_third_grade.pdfIn PDF document text
    • http://dinexun.epizy.com/98979166925.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_off0000f22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22C 5156 bytes
SHA-256: 5ff36a3bf3a387204aad66f01081f94344749bfcdeb3ba0ab534974d3fba7350
font_01_sfnt_off000103b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B2 11292 bytes
SHA-256: e216a4138f1379de363e406cf016c94c65d6d93e3a3b6314c42d257ee347ab6b

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