Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c04f26cd868bf00…

MALICIOUS

PDF

69.6 KB Created: 2021-03-24 02:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fa9a61e028cc8757d040108905c6c741 SHA-1: 915574925a5ecf2d8c3d7a258070a51563249221 SHA-256: 8c04f26cd868bf005c28f9be88d84d83ddc02817ffd43a9f005630f9855720de
126 Risk Score

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 0.9998

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://gimoguvi.ru/wix?keyword=frank+usher+jr PDF link annotation
    • http://sekejibugu.iblogger.org/bokat.pdfIn PDF document text
    • http://masito.space/how_to_reset_nest_programmable_thermostatfnox7.pdfIn PDF document text
    • http://kihepc.xyz/terukikunefixunifo5n3g.pdfIn PDF document text
    • http://morj.space/production_technology_of_cashew_nutsk3f9.pdfIn PDF document text
    • http://fallofelin.online/table_tennis_racquet_casetmgmr.pdfIn PDF document text
    • http://molesisewikatuk.22web.org/elevator_speech_examples_for_college_students.pdfIn PDF document text
    • http://gamowenugeg.sportsontheweb.net/99561012090.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/13619989657.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/tadibusojopigipalumed.pdfIn PDF document text
    • http://giwosoto.sportsontheweb.net/26686005196.pdfIn PDF document text
    • http://shoes-storie.club/duet_display_android_apk_free_download3yvys.pdfIn PDF document text
    • http://banquepopulaire-fr.org/11845055683h0xqg.pdfIn PDF document text
    • http://sozawakofuriwoj.getenjoyment.net/carbohydrates_biochemistry_notes.pdfIn PDF document text
    • http://elerctum.org/fevomivokdfj6.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/wowonesoribu/dejitibanevakov.pdfIn PDF document text
    • http://supajiwa.myartsonline.com/affairscloud_september_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/99623146021.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/20823776808.pdfIn PDF document text
    • http://sebokegekesuded.atwebpages.com/dell_inspiron_n5010_i3_4gb_ram_price_in_india.pdfIn PDF document text
    • http://pawepeg.atwebpages.com/bungen_englisch_present_progressive.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_off0000d4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B9 4836 bytes
SHA-256: dbc3f22c300ff4e69c0aa8369365eaac0c08e78027fd72509f4ddc443aeae4ed
font_01_sfnt_off0000e526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE526 10700 bytes
SHA-256: 762877476e6bde06dd7c5336e7baa4e67eab5f2765184464035b5640f574e34e