Malicious PDF — malware analysis report

Static analysis result for SHA-256 22745fac2d57781c…

MALICIOUS

PDF

78.4 KB Created: 2021-04-12 06:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c36e1b9788dbca2caaacbc804e02aa69 SHA-1: ea78888475da0351885e775dacd5a4700bffad5b SHA-256: 22745fac2d57781cd524130cf12aaadd1d8d5b68853a24b51a6efa7144e4cd3a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a link farm used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of a suspicious URL indicate a phishing attempt. Although no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/strik?utm_term=nys+driver%2527s+permit+renewal PDF link annotation
    • http://folejaf.mypressonline.com/tabozolaxepop.pdfIn PDF document text
    • https://cdn.sqhk.co/nazamesuwute/2MVibgh/32086902023.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/yiihahg/29674388427.pdfIn PDF document text
    • https://cdn.sqhk.co/puvijupem/cschjNd/47823477800.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/1tUOdHl/red_alert_2_online.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/DhdD0HO/tetivovagukusoxebag.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/oggcKib/gazanudopogu.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/vovovege.pdfIn PDF document text
    • https://cdn.sqhk.co/titesojijuko/hdyhhhh/trenches_ww1_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/gggQjfD/black_ops_cold_war_pre_order_beta.pdfIn PDF document text
    • http://bawikivogo.22web.org/types_of_trusts_uk_law.pdfIn PDF document text
    • http://kiladuwujufuzav.22web.org/pdf_to_word_arabic_converter_online.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/subtracting_integers_worksheet_grade_7.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/369dcff7-13ba-48f1-8e52-8e786c9a2a20/how_to_confirm_the_interview_invitation.pdfIn PDF document text
    • http://pibasas.epizy.com/acca_f9_december_2013_answers.pdfIn PDF document text
    • http://timerojulawu.myartsonline.com/voropupapefolaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63135507-3fca-410a-ad4f-de98358fd65b/mukupujaxabizelekiseno.pdfIn PDF document text
    • http://kajopulijus.epizy.com/genie_intellicode_keypad_change_code.pdfIn PDF document text
    • http://lufefavi.epizy.com/dokozixavafogibe.pdfIn PDF document text
    • http://ralomefin.epizy.com/characteristics_of_surrealism.pdfIn PDF document text
    • http://gagodat.rf.gd/retinopatia_diabetica_etiologia.pdfIn PDF document text
    • http://bizepusozuj.epizy.com/vofutifirofimikose.pdfIn PDF document text
    • http://wudujijejek.rf.gd/kamefajob.pdfIn PDF document text
    • http://zuvuzevo.atwebpages.com/schindler_s_list_theme_violin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b87e382-25da-46e5-a8e4-2221ad4c2eab/the_secret_ingredient_hallmark_movie_cast.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_off0000f595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF595 5360 bytes
SHA-256: 117076a494b4af2a5b5f57ac117b2e1110658b164e56e0c02df2e0d99af57b73
font_01_sfnt_off000107df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DF 10116 bytes
SHA-256: 4d3ecf701270756eaaa8a8c71cd43b84f3a32fb3fd476193c8dfa4ea0dfb7ee0

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