Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c98ca23c169a26b…

MALICIOUS

PDF

75.7 KB Created: 2021-03-10 02:59:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b56221e5b35d4d000d5bbb53ae9133a SHA-1: 94ce315d4eb64b931b2a7b9db2f3485b35501866 SHA-256: 0c98ca23c169a26bdabe27620618f967541f8c3b3abaa8edd69f699aac358663
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a significant number of external links, indicating a link farm designed to redirect users to potentially malicious sites. The embedded URLs and the PDF's structure suggest an attempt to deceive users into visiting these sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/wix?keyword=asylum+book+pdf
    • http://zegiwire.sportsontheweb.net/wadapigumemi.pdf
    • http://beststudent.space/6658995199ftrup.pdf
    • http://dutusejutax.22web.org/year_3_english_worksheets_free_printable.pdf
    • http://criticcxck.space/43609450978pvrm3.pdf
    • http://boforotaje.mywebcommunity.org/how_quickly_does_light_therapy_work.pdf
    • http://jubigale.scienceontheweb.net/mapuropa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zejibanunepi.myartsonline.com/candy_candy_manga.pdf
    • http://rofosonovoze.rf.gd/5743224704.pdf
    • https://s3.amazonaws.com/gafedupeba/kuiu_guide_jacket_for_sale.pdf
    • https://006b50d4-ad2a-4261-8279-34542eb0d7b0.filesusr.com/ugd/a640e9_78c98aebdb624921a4add55ec39250e3.pdf?index=true
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_abb2415adddf471b9b538d04405caa26.pdf?index=true
    • https://s3.amazonaws.com/lekelepowo/food_banner_design_vector_free.pdf
    • https://s3.amazonaws.com/dogevazapiwediw/58112720862.pdf
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_22783f9070914843abc892e23812aa40.pdf?index=true
    • https://s3.amazonaws.com/babetafaperaxov/legrand_cable_trunking_catalogue.pdf
    • http://xajuvezovaguze.rf.gd/1553529296.pdf
    • https://s3.amazonaws.com/nigimul/pesebunosuvujisuxek.pdf
    • http://falumivifovupe.rf.gd/physically_based_rendering_course.pdf
    • https://s3.amazonaws.com/libowebujakux/kesozatamem.pdf
    • https://s3.amazonaws.com/fopalew/hd_movie_hub_bollywood_movies.pdf
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_855fd37fa6e4472c9d355a76f0c330fb.pdf?index=true
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_dffb97157abc436e92103e08e0f319d2.pdf?index=true
    • http://kitukogoxav.epizy.com/how_to_say_intelligence_quotient.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2f.bin
3608e1b709e5f4e5163c22a9536d0fe5e69186643c56a37c80365240d7f6500e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2F 5176 bytes
font_01_sfnt_off0000fdc7.bin
2f9b9c008bb604345df769bfbffd2404e9406be27729885d6ef0ed47aa3519e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC7 10384 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.