Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d6befe79aefab5…

MALICIOUS

PDF

68.3 KB Created: 2021-04-07 14:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 720462f27bf2b652b7259070dedc56e4 SHA-1: 22ef85131487ebb32223e8b9ca2ef75506853bee SHA-256: 43d6befe79aefab553141b02c0dd6869dafb196dd039ecda6d2fd1a63728271b
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery attempt. It contains numerous embedded URLs, with one prominent URL leading to fokemale.ru, suggesting a phishing lure disguised as a search result. The PDF structure and embedded content are consistent with attempts to exploit vulnerabilities or deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/strik?utm_term=how+much+oil+in+troy+bilt+2410 PDF link annotation
    • http://krokoboko6.xyz/renault_r-link_2_manuallw6wp.pdfIn PDF document text
    • http://milanomoda-italy.website/february_valentine_day_date_sheetztiov.pdfIn PDF document text
    • http://zurujavurobe.scienceontheweb.net/compelling_conversations_japan.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/hgKhew4/57890191956.pdfIn PDF document text
    • http://bristol-yalta.run/vlookup_excel_in_2_sheets7b1q1.pdfIn PDF document text
    • https://depewezuluro.weebly.com/uploads/1/3/4/1/134108544/devebu-mejabuzuti-xizup-sarugokuvafu.pdfIn PDF document text
    • https://cdn.sqhk.co/jikogifuxa/EiaijWt/rikolewixusov.pdfIn PDF document text
    • http://keto-menu.online/virevaruxejebituxenepja5e.pdfIn PDF document text
    • https://vigegenatiborig.weebly.com/uploads/1/3/0/7/130740049/pepawigapunufe-bilirus.pdfIn PDF document text
    • http://mnogolidov.xyz/64543587627moe8v.pdfIn PDF document text
    • http://buloshnaya.site/33819378087cipdm.pdfIn PDF document text
    • http://naturmilans.fun/nifinipewatuzoxuwf22h.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/what_is_a_visual_analysis_paperwp42u.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/UhbhdqP/amazon_alexa_echo_show_5_app.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/boxalewijim/detapalemesil.pdfIn PDF document text
    • http://fuluxewamotate.atwebpages.com/mobijikejiko.pdfIn PDF document text
    • http://mijovutotukedes.onlinewebshop.net/worthy_is_the_lamb_hillsong_sheet_music.pdfIn PDF document text
    • http://mojozore.myartsonline.com/27779257330.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/hp_photosmart_plus_b210a_ink.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/liwubazudipuki.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_off0000ccf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF6 5360 bytes
SHA-256: fa701a62270d7b930be481dcff9f3a132d69b108fa5b54267c6b0f557ceac8fc
font_01_sfnt_off0000df2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2D 10784 bytes
SHA-256: 529326b4a11d743fc75f6a911308d09fba5e980764682b03be8ae543062bc3e6

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