Malicious PDF — malware analysis report

Static analysis result for SHA-256 1015bd0e2e107650…

MALICIOUS

PDF

79.5 KB Created: 2021-04-12 15:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: eefffdab7b7d6e50fd02fee69bdedccd SHA-1: 5f28aebaad3fb1bf9c79ce75c157dbad07ac3e69 SHA-256: 1015bd0e2e1076501e14ab7c161ff99dabb8fa23b385cb72d513e00f23e41b10
126 Risk Score

Malware Insights

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

The PDF contains multiple external URLs, including one pointing to 'xajibur.ru' which is associated with a search query about resetting a Honda Accord maintenance light. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://xajibur.ru/strik?utm_term=how+to+reset+honda+accord+maintenance+required+light PDF link annotation
    • http://salonly.xyz/65931171015fajqe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450259/normal_6005df26ca9b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404725/normal_6004c5d273c39.pdfIn PDF document text
    • https://vewejefimubi.weebly.com/uploads/1/3/4/1/134108794/9654289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472775/normal_6053358c95ada.pdfIn PDF document text
    • https://ruxodinari.weebly.com/uploads/1/3/4/3/134377607/poteragow-relired.pdfIn PDF document text
    • https://fukubumo.weebly.com/uploads/1/3/4/0/134016705/7768107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466175/normal_5fe9a374c3a1d.pdfIn PDF document text
    • http://leledup.mypressonline.com/which_weight_goes_where_on_a_grandfather_clock.pdfIn PDF document text
    • http://wunuxuvi.sportsontheweb.net/promoting_active_learning_strategies_for_the_college_classroom.pdfIn PDF document text
    • http://difemetudanad.22web.org/xikixorumewidaraduzofug.pdfIn PDF document text
    • https://xomixosusanit.weebly.com/uploads/1/3/1/4/131438267/fuvipotumiwomibutitu.pdfIn PDF document text
    • http://dajekubawanumef.iblogger.org/buku_cerita_anak.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/union_budget_2020_highlights_upsc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466379/normal_5ff899a885bb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_5fd9e40476394.pdfIn PDF document text
    • http://compte-cmbretagne.best/grammarly_desktop_appt2flx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajowezurub.rf.gd/how_to_become_a_certified_personal_trainer_for_free.pdfIn PDF document text
    • http://wusudafatuzawe.epizy.com/cocktail_attire_vs_semi_formal.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/arjuna_award_2020_winner_list.pdfIn PDF document text
    • http://jiguxikawijax.rf.gd/5432569977.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/39561191094.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_off0000f713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF713 5532 bytes
SHA-256: 712a0e3a8dab3d0efd53bce2c127a3dc565c05fecf3577ab19ccc2eb7acf2124
font_01_sfnt_off000109bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BB 11344 bytes
SHA-256: 0b1925001b7ab725c8ec0245b0d1870355efe85a150ef017aa2dbd2a44ba6eac

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