Malicious PDF — malware analysis report

Static analysis result for SHA-256 e542110a1c3d9a85…

MALICIOUS

PDF

74.5 KB Created: 2021-03-28 06:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e586b567a46c4c1b082f17dae5db719b SHA-1: 94fb5a2dad1287a27d0c47d1a2a9be0ff01c6357 SHA-256: e542110a1c3d9a85b7f397022cb375a19b1baf2bca9858c70665bbe89a18bc58
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a malicious intent to obscure the true destination. ClamAV detection and ML classification further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://ponafet.ru/strik?utm_term=can+i+connect+my+iphone+to+samsung+soundbar PDF link annotation
    • http://levantemosaic.com/mofujuxo2igmi.pdfIn PDF document text
    • http://bu-markett.com/utada_hikari_mp3wrx3n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481411/normal_60451e7214111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472501/normal_602c3e9baa4c7.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/is_rheem_a_good_hot_water_tank.pdfIn PDF document text
    • http://menformula.xyz/13352591812rmcwd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_601df4534071e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500186/normal_6051c9e4562d7.pdfIn PDF document text
    • http://sexesex.site/proform_505_cst_treadmill_2014_model_manual2156r.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/nujexo.pdfIn PDF document text
    • http://item-get.top/waluplxtom.pdfIn PDF document text
    • http://vkrowl.com/4-3_trigonometric_functions_on_the_unit_circle_worksheet_answerslb3js.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/xubigokovotisekaxogamuv.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/how_to_study_for_ochem_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502698/normal_604a5a75edbc1.pdfIn PDF document text
    • http://uaportal.site/ahmet_kilic_stumblin_inumpa7.pdfIn PDF document text
    • http://arthromedshop.xyz/facebook_lite_update_version_2019914vh.pdfIn PDF document text
    • http://zusiwibewire.mypressonline.com/vorovujek.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/what_is_the_difference_between_oral_b_500_and_1000.pdfIn PDF document text
    • http://kobazugipodiv.medianewsonline.com/puramuxakidexibogav.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/a_level_physics_roger_muncaster_download.pdfIn PDF document text
    • http://proita.space/macam_macam_jaringan_pada_tumbuhan0bdei.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mozutulobiris.onlinewebshop.net/romuxatazibusozanuwu.pdfIn PDF document text
    • http://badamowafe.onlinewebshop.net/41876409571.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD976 5604 bytes
SHA-256: ff538d26faadd94caf05861e6fc9fc212ef4f5b193e495e376a9789fcf4f1529
font_01_sfnt_off0000ec4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4D 2000 bytes
SHA-256: 7e007db5cc846c4a1f81ff98a6fa0ec978cd378166c495095324491e4272fec5
font_02_sfnt_off0000f581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF581 10764 bytes
SHA-256: 724e868fba2ad9900b15c4e645dee7ca872b7ccacdd99fcde73c66021142568d

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