Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9af73bea608fc3c…

MALICIOUS

PDF

77.0 KB Created: 2021-04-29 14:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9ed614d2c9954ce186f1d9a4bb01720b SHA-1: 89259fa7749f50ac5201a50d02f19aa0cb0eb95c SHA-256: d9af73bea608fc3c5e46453f22047da002a7573a0974d6b361062439b1f506ba
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to a malicious site.

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://lozipotod.ru/strik?utm_term=film+a+woman+in+berlin+full+movie+sub+indo PDF link annotation
    • http://trickyturkey.com/how_is_magnesium_extracted_from_its_oreoj2wp.pdfIn PDF document text
    • http://vkysnaya-eda.site/4004210954frd3w.pdfIn PDF document text
    • http://rijepesejib.22web.org/nasamepubigefawamot.pdfIn PDF document text
    • http://uk-delfin.ru/raresekirovopoxamizuzu0h63n.pdfIn PDF document text
    • http://tehnotop.site/tom_clancy_ghost_recon_breakpoint_pc_digital_downloadalp58.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/zowejunef/zafej.pdfIn PDF document text
    • http://vutilunero.rf.gd/pstet_2019_syllabus_paper_2.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/impossible_quiz_1_answers_23.pdfIn PDF document text
    • http://gavigepovu.epizy.com/ripajotorosezatisa.pdfIn PDF document text
    • http://zopiselewanut.epizy.com/the_count_of_monte_cristo_anime_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75afcf43-b511-45e1-bd55-3fa6adda2af2/xeviparak.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/42161677093.pdfIn PDF document text
    • http://kumobeba.epizy.com/phenotype_and_genotype_questions_and_answers.pdfIn PDF document text
    • http://waroxudon.epizy.com/nasumezelisojalazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd0c03aa-ee1f-4b27-b567-84f6c456d52e/in_a_dark_dark_wood_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c325f9-cd62-4250-8ffb-3c89198814a7/88586975667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/580c8c86-2e04-4dc9-83b0-6bdd3517eda6/what_document_created_the_three_branches_of_government.pdfIn PDF document text
    • http://volajigatume.epizy.com/keurig_k_elite_coffee_maker_directions.pdfIn PDF document text
    • http://xugibomexepef.rf.gd/the_bye_bye_man_free_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b4105c-05d2-4614-b902-d1494bd8b0e6/dumagepojigutamibum.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC3 5300 bytes
SHA-256: c4b33090790347ccdefb8183b9c4d7792cf0d29d6ab032b91379fa2c68d29e01
font_01_sfnt_off000101c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 11100 bytes
SHA-256: 8ad14297d1f1e3b10e463b00f47362218afb0306776ed051c8b5068f7b5c2f34

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