Malicious PDF — malware analysis report

Static analysis result for SHA-256 03430474da81142f…

MALICIOUS

PDF

69.9 KB Created: 2021-04-22 01:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4a3466b47587c7de26f43299a80afc7a SHA-1: b86be7776f359d3d469e66ef00936a31bd147f2f SHA-256: 03430474da81142f3ed68e2f3835d9602839ec2f6f8a7bad34e1e25684080f67
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, suggesting a phishing or redirection attempt. The primary URL, 'https://gimoguvi.ru/strik?utm_term=edexcel+igcse+chemistry+textbook+pdf', is designed to mimic a search result for educational content, likely to trick users into clicking. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=edexcel+igcse+chemistry+textbook+pdf PDF link annotation
    • http://modivitexef.22web.org/how_to_crochet_a_beanie_cap.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/jeIghji/ccleaner_pro_free_for_windows_8.pdfIn PDF document text
    • http://pukimupupe.22web.org/scrum_values.pdfIn PDF document text
    • http://tuwomisajam.iblogger.org/fobasi.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/jfLBNyb/21473772776.pdfIn PDF document text
    • http://taygerr.com/273400608976oo38.pdfIn PDF document text
    • http://damvglaz0.xyz/81682257622mjr9l.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/deugiQR/derarorolijadoxodejowod.pdfIn PDF document text
    • https://cdn.sqhk.co/vajegipofuz/iieidH8/astrologian_divination_guide.pdfIn PDF document text
    • http://tefituguj.iblogger.org/mejelutakegufurelo.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/hiYggrz/55316576513.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fugubujilaxi.epizy.com/gotaxigejerewifetamifovep.pdfIn PDF document text
    • http://sasofinifujilo.epizy.com/kijepotenezut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dcb4760-c419-4fee-973c-91dc579f2f2d/is_retribution_the_best_form_of_punishment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6430dbbc-63ba-41c1-a38b-bc5d16b806f7/do_chevy_traverse_have_transmission_problems.pdfIn PDF document text
    • http://zunimesigo.rf.gd/51269622198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff7235f-2bac-482b-9455-4aab9bd02d0a/ketozo.pdfIn PDF document text
    • http://fizanotafogibag.rf.gd/zepewiwopawijanepufuk.pdfIn PDF document text
    • http://sufojokene.rf.gd/37044082762.pdfIn PDF document text
    • http://vizawenep.epizy.com/nicomachean_ethics_book_7_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00235776-d95e-48c7-8c43-03a5756d2ec0/81837016577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3911926-4cfa-4e49-9161-cd63b515cfec/principles_of_physics_halliday_resnick__walker_11th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a47675eb-d5be-462f-bf5c-7de6944d2f00/becoming_a_person_of_influence_chapters.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_off0000d475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD475 5692 bytes
SHA-256: 6f1c0432d91fd1ef2344ac5296a9f57fbde99381f3721fba6b4cfebaf6265027
font_01_sfnt_off0000e7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B7 10108 bytes
SHA-256: 2942459641c43a70761208c35a5810c0bef3eb0e80644162b3edba66cf852f1e

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