Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06c6fb83ff012dc…

MALICIOUS

PDF

75.4 KB Created: 2021-03-18 08:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ac2c07c17fab8ad8b64e4c0fdd76296a SHA-1: 5c3a508f5c5c17bdc484a5bc4c09babc95635795 SHA-256: b06c6fb83ff012dcefac70573616fef09be4e90502206abb7ab3d10c64e7e3b8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://golowaki.ru/aws?utm_term=homelite+weed+eater+fuel+line+replacement PDF link annotation
    • http://flipping-car.online/97675166221hp715.pdfIn PDF document text
    • http://glossywp.online/remerumanury3e9m.pdfIn PDF document text
    • http://atlas-copco.su/curriculum_oculto_y_formal0jxzv.pdfIn PDF document text
    • http://zekoselu.22web.org/tangled_movie_in_tamil_dubbed_free.pdfIn PDF document text
    • http://mantenancie.com/the_blackmans_guide_to_understanding_the_blackwoman_download5e1k9.pdfIn PDF document text
    • http://creditreportus.info/dell_ultrasharp_u3011_driverza3gc.pdfIn PDF document text
    • http://sugewute.22web.org/kotagufe.pdfIn PDF document text
    • http://zoo-taxi.site/52811173800uadon.pdfIn PDF document text
    • http://matizaw.mywebcommunity.org/83945790664.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/pufunopopovigewojevun.pdfIn PDF document text
    • http://e-devletodeme.net/16585918381oey4n.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/68370710970qwrur.pdfIn PDF document text
    • http://2gusevshop.space/957277479803ff7f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09856b9-4809-4254-b4e9-8514e13b30f7/que_hace_un_supervisor_de_produccion_en_una_empresa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a773d5f-d870-47b4-a6a9-12dc7056cf81/little_fires_everywhere_show_episodes.pdfIn PDF document text
    • http://rowagaparik.rf.gd/warranty_certificate_format_for_furniture.pdfIn PDF document text
    • http://fabotiwes.rf.gd/kikenoraga.pdfIn PDF document text
    • http://poziluxolebulu.epizy.com/clases_de_sustantivos_ejercicios_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37e0ed57-f531-49c5-8e2e-2e76293dd870/pifesurowurusitesojewovir.pdfIn PDF document text
    • http://nivuzujanux.myartsonline.com/22151819192.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/albinoni_adagio.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_off0000e86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 5176 bytes
SHA-256: 1ba079d6af989d05eccefa0b9b8e657b86d75ecef45b014cee500601927c505e
font_01_sfnt_off0000fa01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA01 10808 bytes
SHA-256: b26bd969eb73385dff58af12bda923c56d8a7192dafc96587b890d7591725f3c

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