Malicious PDF — malware analysis report

Static analysis result for SHA-256 48193bac18743f8a…

MALICIOUS

PDF

76.4 KB Created: 2021-04-10 19:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b4aa2334f2b3f196d2369fcceb2b4d70 SHA-1: 695cc61e6d5dab8d10ce756ae5d67df9d1e481de SHA-256: 48193bac18743f8ad3dab09f83d7d58c6a4a480367f36cdb6c77c2a2e7fd06b2
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting, suggesting a link farm designed for SEO manipulation or phishing. The primary URL, https://dugedepap.ru/strik?utm_term=dell+venue+8+pro+charger+port+replacement, is presented in a way that mimics search results, likely to trick users into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=dell+venue+8+pro+charger+port+replacement PDF link annotation
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/takulexo.pdfIn PDF document text
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/nerigosedikodo_resewebulerug_lagerolupivotid_malegoge.pdfIn PDF document text
    • https://wusitezuredov.weebly.com/uploads/1/3/5/3/135314125/suligepotedag-genifujimag-gelud-tidoxidevanison.pdfIn PDF document text
    • http://xadexawufomovi.sportsontheweb.net/coloring_book_alphabet_letters.pdfIn PDF document text
    • https://kumapeforurimo.weebly.com/uploads/1/3/4/6/134664671/9694059.pdfIn PDF document text
    • https://lefokanu.weebly.com/uploads/1/3/4/3/134377273/3696206.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mukut/58307535685.pdfIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_615a09862bf447c48d2b66c201a1e075.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mukut/latojufab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a50c4b55-1afd-47e3-b096-84d7f772317a/42167728216.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_5436d5c77add4ec885f66dc2cc5e5d4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/xuguxufijelekaxegomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e49e5b2d-d77d-475d-b224-7213d4572a4d/sig_sauer_p226_sao_rx_holster.pdfIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_2b3ff4c657ad47b69e1d2bfc21a129fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d00fea55-3628-4b43-907e-7448e5977dde/hisense_smart_tv_apps_disney_plus.pdfIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_53c9266940994935a7df3273400b1824.pdf?index=trueIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_f530622514084174aba0915922db40ac.pdf?index=trueIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/arc_length_of_a_circle_worksheet.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/htc_1_m8_screen_replacement.pdfIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_4f02eb9bdcb740ae878c92f0634296f0.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44B 5424 bytes
SHA-256: 5d7f8fdea8358e31ce9b39413de490ac01b9670e42e5d7a8517eb185a37c158c
font_01_sfnt_off0000e6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A6 11076 bytes
SHA-256: abd35075e0aca40742f6f5cb906528202a7c2c119e87a9a735a751bf68438407
font_02_sfnt_off00010ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE1 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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