Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb380c743b116138…

MALICIOUS

PDF

81.4 KB Created: 2021-06-02 08:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85ccde63f702c7e503486a9860e756f2 SHA-1: c6cc11128c41b6d7d8f960eccf04b8fdb9fac05f SHA-256: eb380c743b116138635eca6cf9628044a449f957ab014be2057a49a3d3fa9acc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary URL, https://queure.ru/pbw?utm_term=how+to+charge+my+everstart+jump+starter, appears to be a lure for users searching for specific information, likely to redirect them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/pbw?utm_term=how+to+charge+my+everstart+jump+starter
    • https://cdn-cms.f-static.net/uploads/4403260/normal_5fd10889ab5bb.pdf
    • https://nibevomixosu.weebly.com/uploads/1/3/4/1/134108547/1168939.pdf
    • https://volifinidolil.weebly.com/uploads/1/3/0/8/130873876/2850963.pdf
    • https://cdn-cms.f-static.net/uploads/4424951/normal_6041927e50475.pdf
    • https://static.s123-cdn-static-d.com/uploads/4468554/normal_60b70e2d98a55.pdf
    • https://static.s123-cdn-static.com/uploads/4460946/normal_5fde6ffc525ab.pdf
    • https://cdn-cms.f-static.net/uploads/4501042/normal_604a84fa0c64c.pdf
    • https://mobuwutibuw.weebly.com/uploads/1/3/0/7/130739624/tuzewu.pdf
    • https://zuxolizaf.weebly.com/uploads/1/3/2/7/132740519/serelegibujurukefino.pdf
    • https://nufupegovofa.weebly.com/uploads/1/3/4/1/134131424/mufipamiwopasesewag.pdf
    • https://cdn-cms.f-static.net/uploads/4424646/normal_6041e40a395e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vibasuvezuz.pbworks.com/w/file/fetch/144494187/sunakogutisis.pdf
    • https://uploads.strikinglycdn.com/files/9d677c0e-2ffe-4623-9178-a1f8b8eed538/samsung_top_load_washer_dc_code_fix.pdf
    • https://uploads.strikinglycdn.com/files/0e08a951-5771-4353-adea-0de11da22f66/what_is_purpose_of_power_circuit.pdf
    • http://bemulopawed.pbworks.com/w/file/fetch/144442845/freeman_dyson_libros.pdf
    • http://pafunanukexe.pbworks.com/f/zaxavamiliwujewugaraxiwiw.pdf
    • https://uploads.strikinglycdn.com/files/01bd9998-14d1-4a9c-af89-6c726985f90d/smart_wristband_2.pdf
    • http://jajafad.pbworks.com/w/file/fetch/144420015/61992626876.pdf
    • https://uploads.strikinglycdn.com/files/2cb73875-a27a-4499-8464-3070060dadc2/kawasaki_vulcan_1500_service_manual_free_download.pdf
    • https://uploads.strikinglycdn.com/files/02e717be-44cd-4d0a-9910-82881633546f/runekifi.pdf
    • https://uploads.strikinglycdn.com/files/d40138ab-692b-4a2a-a594-33f33dd8baec/8820399966.pdf
    • http://moxulolo.pbworks.com/f/guion_teatral_de_los_tres_cerditos_y_el_lobo_feroz.pdf
    • https://uploads.strikinglycdn.com/files/264f8bc8-72b7-4786-91c0-e0db23fc09db/bombas_de_paletas_hidraulicas.pdf
    • https://uploads.strikinglycdn.com/files/af48cc09-f213-4856-a0e0-78e84efb9a01/masters_degree_in_health_economics_in_germany.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_off0000fabb.bin
5a49e2b92511c06ed533ece65fb3e37326ae5ef90692889154010a08507c1419		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFABB 5608 bytes
font_01_sfnt_off00010dc6.bin
2f147bf41e377ce8ba2ab49fbeccf991cfcd2c0aaeab66ba506afb54e11bccc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC6 11936 bytes

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