Malicious PDF — malware analysis report

Static analysis result for SHA-256 730148e8cdc4a36d…

MALICIOUS

PDF

78.7 KB Created: 2021-02-26 02:38:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02d375aa52d6cb5062f8ca1865350dda SHA-1: 1312ffad962551811bc03223505dd297de75c558 SHA-256: 730148e8cdc4a36d47fb75281c3ff1ab1d0743bdbf9c7b0ed6dddd8479acd8d4
186 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, characteristic of SEO spam or a distribution mechanism for further malicious content. The ML_NYX_PDF_MALICIOUS heuristic and the PDF_SEO_LINK_FARM rule strongly suggest this file is part of a larger malicious operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/wix?keyword=99+summoning+guide+2019 PDF link annotation
    • http://sunipemumax.66ghz.com/retowogatokunuwiv.pdfIn PDF document text
    • https://sufosuzupunu.weebly.com/uploads/1/3/1/3/131379650/293d8d237.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/jaxonekef.pdfIn PDF document text
    • https://fojifipavubi.weebly.com/uploads/1/3/4/6/134618349/xelitujumun.pdfIn PDF document text
    • https://pigunakates.weebly.com/uploads/1/3/4/6/134628742/9979921.pdfIn PDF document text
    • https://fadefufogu.weebly.com/uploads/1/3/5/9/135960472/bejijotumu_tegofedamubaras_popudepofuna.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/listado_de_verbos_irregulares_en_ingles_con_traduccion_al_espaol.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/74244354687.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/what_is_a_battery_float_charger.pdfIn PDF document text
    • https://pejexiguwela.weebly.com/uploads/1/3/1/1/131164442/xusuzifokuparoxev.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/85819182020.pdfIn PDF document text
    • https://wigawiwamenusum.weebly.com/uploads/1/3/5/3/135323889/7238261.pdfIn PDF document text
    • https://xisasuwida.weebly.com/uploads/1/3/4/4/134472621/jonekibititewagaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuxusemo.epizy.com/89365509424.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/fozubiwusule.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/kodekalolaf.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/food_costing_template_uk.pdfIn PDF document text
    • http://nusavigosewu.epizy.com/95987338423.pdfIn PDF document text
    • http://zeluzara.epizy.com/81174863734.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_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 5192 bytes
SHA-256: 634f380fdb33482e0eeac8df37a3d0b890c085832de13ab8dc08e0314e52ee67
font_01_sfnt_off0000fe99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 15160 bytes
SHA-256: 8460364ce3703050d80ebf7db89bd96daf9556e394f213b2854d55b6e1c84164

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