Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08f47e02f5ab016…

MALICIOUS

PDF

83.6 KB Created: 2021-04-10 16:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2d68fadb8a98b727d01a8a9770796b05 SHA-1: b0d55343510cc60c3f486836a6ab67da26695248 SHA-256: e08f47e02f5ab01621786fbebc301f7f39b5d1be02a563db059d8d79d4b7c6f3
126 Risk Score

Malware Insights

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

The sample was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. Multiple external URIs were extracted, suggesting an attempt to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to 'Lexus es 350 tire size 2008' and 'wkhtmltopdf', which are likely lures to disguise the malicious intent of directing users to the numerous embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=lexus+es+350+tire+size+2008 PDF link annotation
    • http://meroxisawifagu.mygamesonline.org/4.03_judicial_opinion_template.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/spiral_ham_oven_temp.pdfIn PDF document text
    • http://botefin.medianewsonline.com/glossary_of_banking_and_finance.pdfIn PDF document text
    • http://tewatag.medianewsonline.com/computer_application_in_business_bba.pdfIn PDF document text
    • http://rebibedo.mywebcommunity.org/66396805336.pdfIn PDF document text
    • http://fafigowe.22web.org/exemple_de_cahier_de_charge_site_web.pdfIn PDF document text
    • http://miraluvofizobe.medianewsonline.com/86069887672.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/94972487426.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/fufepujapedupibufewebo.pdfIn PDF document text
    • http://rijebipimaba.getenjoyment.net/calendario_diciembre_2020_para_imprimir.pdfIn PDF document text
    • http://fonepegadadujeb.iblogger.org/kitum.pdfIn PDF document text
    • http://lamatokatov.22web.org/19823256238.pdfIn PDF document text
    • http://ferafukapawap.scienceontheweb.net/tadutufirosigasegepakuze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://japamitafixe.myartsonline.com/tikanoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/69271810742.pdfIn PDF document text
    • http://jowofosepenomun.rf.gd/juwaparevikibafade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9edef87-6914-49c1-bded-10645decca24/fofawifavekamogufagejedur.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/outlander_book_series_5-8_paperback.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/282afe2f-36e3-4684-8804-859eb7aff878/3441386324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276d5634-281f-438f-859f-1357bbf58ad1/32247802458.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/video_er_android_2019.pdfIn PDF document text
    • http://zinurefel.rf.gd/os_pensadores_bachelard.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_off00010a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A05 5252 bytes
SHA-256: f9e615e47aa8e8f1f2b990cf65d2df219233b0b4e716a76ee259a8a2e6142a9b
font_01_sfnt_off00011c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0E 11240 bytes
SHA-256: 675dc0af9087e79dde69c522cd716be79d1f1f2fd84b91465245246c1e3f0324

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