Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a864a96177bd31…

MALICIOUS

PDF

86.7 KB Created: 2021-03-30 14:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2904f316e4d85c1822326ca044e66274 SHA-1: 7e093295b36d637fbc48e8e657f9b694b696e570 SHA-256: e4a864a96177bd3178c35c9b107d1d921e300f911161ec3d1ba2375ef2aed29a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'ponafet.ru' and another to 'sqhk.co', suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, appears to be a lure related to a common search query, aiming to trick users into clicking malicious links.

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://ponafet.ru/strik?utm_term=why+does+my+dryer+drum+not+turn PDF link annotation
    • https://cdn.sqhk.co/xopuwatipo/jggghbz/best_free_voice_recorder_app_for_iphone_6.pdfIn PDF document text
    • http://salopkisa.website/26028858334pohkm.pdfIn PDF document text
    • http://vixerixobo.22web.org/96088933988.pdfIn PDF document text
    • http://japancar-sib.ru/rudanotusokipoxzw1g5.pdfIn PDF document text
    • http://tryse.xyz/39998344113k8wtx.pdfIn PDF document text
    • http://prodit.space/gazetted_officer_certificate_for_aadhar_cardd31fe.pdfIn PDF document text
    • http://skywonder.space/dibujo_artistico_anatomia_humana8v5p9.pdfIn PDF document text
    • http://strgb2.ru/17563095669pzti5.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/dib12hi/jurassic_world_alive_glitch_ios.pdfIn PDF document text
    • http://vojutivuzijan.22web.org/25847635448.pdfIn PDF document text
    • http://znakomstva18x.site/warcraft_iii_pricedcfww.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://goduzidexemave.epizy.com/mexuboziridumunazivovobos.pdfIn PDF document text
    • http://xaxibalese.epizy.com/zelipowepokunubedenalasum.pdfIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_716addb09ca744c28a360da19cf55775.pdf?index=trueIn PDF document text
    • http://guruzukatukeged.epizy.com/is_vampire_diaries_based_on_stefans_diary.pdfIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_bc6def2186b44ddfa63ba61723c8463e.pdf?index=trueIn PDF document text
    • http://filirepakej.epizy.com/definicion_de_actitud_positiva.pdfIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_d87f0c2e27f6472c8446e7c91081f4fc.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3D 4772 bytes
SHA-256: 28420f06566d2154d33324a96edce01cc6a43212b46912434bbffbeb5ee39cfd
font_01_sfnt_off00011a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A56 10976 bytes
SHA-256: 3e0522168a12590dcd02774dbedb08270360d0ca0e032884d968279218b3d2a2
font_02_sfnt_off00013fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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