Malicious PDF — malware analysis report

Static analysis result for SHA-256 e724dfbc352043c4…

MALICIOUS

PDF

116.6 KB Created: 2021-03-18 22:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: dd20678372771816ad9fe9e6476b35f1 SHA-1: 399b3a11d4817a9b45adcaa0a9866c56b2904e05 SHA-256: e724dfbc352043c437360dad2f4f61404be883e88c5904912395a29457a86297
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URL 'https://midufefew.ru/award?keyword=beauty+and+the+beast+pdf+book' is likely part of this lure, attempting to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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 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.
  • 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://midufefew.ru/award?keyword=beauty+and+the+beast+pdf+book PDF link annotation
    • http://instapriz24.online/frm_part_1_practice_questionsmg2jc.pdfIn PDF document text
    • https://murarukaxew.weebly.com/uploads/1/3/4/6/134666391/1512539.pdfIn PDF document text
    • https://nalakipivexovob.weebly.com/uploads/1/3/4/3/134385055/vusoxas-xulemerobiguve.pdfIn PDF document text
    • http://aazzzry.space/powerpoint_timeline_chart_template51x5s.pdfIn PDF document text
    • https://regakoxunurur.weebly.com/uploads/1/3/4/3/134380337/danodones_sepogoruzifug_jilut_zakegirideda.pdfIn PDF document text
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/doxogebu.pdfIn PDF document text
    • https://fovezifume.weebly.com/uploads/1/3/0/8/130874198/murezox_gigovijifudupux_xuviwururofa.pdfIn PDF document text
    • http://jubemexor.22web.org/fowotozela.pdfIn PDF document text
    • http://pedalini.club/213581198420mooh.pdfIn PDF document text
    • http://itsamorem.com/29937030625huhuo.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/75c73bba-12a6-4475-bc1a-5fbaa602a9eb/gujuvasarugojoraniwuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d66868a-ebfe-4e2f-bbe7-c9ab6481b94b/gre_test_prep_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f6b020-8989-4156-9583-f22e6c7d1e03/ideas_para_decorar_corona_de_adviento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c282810e-936a-44cf-9ff3-7eb7b61b8b3b/jovawovoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c3aa51-3e0c-4fc9-9a02-942b59116673/28193123581.pdfIn PDF document text
    • http://naxefebubelaj.rf.gd/fonodako.pdfIn PDF document text
    • http://pabaxekuvo.rf.gd/zomogomegamedozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48bdbb75-4284-4437-86f8-9ed9a4e05fca/why_is_smoke_alarm_chirping_after_changing_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/how_to_remove_fireplace_doors_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/xeniwituzimesimosup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e888d61-3260-4214-97b7-20c585b82319/42119312058.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/pikoralibazazofexukan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a99350f4-e945-4845-8c82-7573f0fb5644/83761400147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5723b1d-47cf-4150-96d1-4139aa53f690/19339667299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf3c03d-ec91-4bba-8937-23627a7e80e4/how_to_fix_bissell_vacuum.pdfIn PDF document text
    • http://witoluteg.epizy.com/79846738945.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_off00017e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E6F 5356 bytes
SHA-256: 3ff8f9510c5426e756984894db14a5ce1e375dae126169ab0b6e9d32522426cb
font_01_sfnt_off000190ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190AC 18500 bytes
SHA-256: 7b217318e829dd3b6b50f1540fcfb9373d89a720a23f4edae8d514e7c4850bbb

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