Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e2edd85ead504e…

MALICIOUS

PDF

72.5 KB Created: 2021-02-19 02:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dc18048b91ef3005a0ed442a8d321ea3 SHA-1: 0fb8c6082c908c52d232355dcd7801e6bd3f7261 SHA-256: e0e2edd85ead504e708faa020a70d868356359d8c95ac3ade52ad2161df1a885
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect the user to malicious sites, potentially exploiting vulnerabilities or delivering further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/aws?utm_term=jet+jj-6csx+knives PDF link annotation
    • http://help-feedback-amzn6.xyz/marketing_research_tools_and_techniques_nigel_bradleycekju.pdfIn PDF document text
    • https://wobufijurix.weebly.com/uploads/1/3/1/6/131607063/0530474785e79d1.pdfIn PDF document text
    • http://sarkife.site/mud_bogging_events_in_wisconsinepxg3.pdfIn PDF document text
    • http://jixaravaxagisuf.22web.org/91384089812.pdfIn PDF document text
    • https://bafexobis.weebly.com/uploads/1/3/4/0/134041027/pazisukos_diduvefaz_golidigesukela_geledevo.pdfIn PDF document text
    • https://tunupufimudodo.weebly.com/uploads/1/3/4/3/134324073/ragapuwalex-xofanod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_600a501194965.pdfIn PDF document text
    • http://frut-tree.site/81882234436zb69l.pdfIn PDF document text
    • https://nebobaxewakizix.weebly.com/uploads/1/3/1/6/131637309/jogasebexuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450249/normal_5ff93258bcebb.pdfIn PDF document text
    • http://prolac.ru/furreal_panda_instructionsznmb7.pdfIn PDF document text
    • http://dietnatur.fun/types_of_adjectives_in_englisht243f.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/xidabalowajujujider.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/vebenok/rozugurotakekewulapiwul.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/angularjs_form_validation_input.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/kannada_voot_app_free.pdfIn PDF document text
    • http://siparedobapu.rf.gd/nurse_case_manager_resume_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/tecnologia_informatica_fjo_blogspot.pdfIn PDF document text
    • http://vuzajakexe.epizy.com/75369589304.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/65126094124.pdfIn PDF document text
    • http://femiworuw.rf.gd/why_not_more_percy_jackson_movies.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_off0000dbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD6 4900 bytes
SHA-256: e8d2b7d955035b64d1b19e4c1f3ccb30a7a807dc1cdb912ed651620d58f33ea1
font_01_sfnt_off0000ecb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB5 12008 bytes
SHA-256: 763a7c89136c300dd732575c0569b5e88d32cca2e473cd3b6f995b98276caa71

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