Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d717a8d9890f25c…

MALICIOUS

PDF

73.7 KB Created: 2021-05-15 11:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 96b76d391646a24937130f2b123f7663 SHA-1: 27ab25cea95fb62ded15adbdbaae8a91bdadc143 SHA-256: 5d717a8d9890f25ccec51fcb3c6cb438ad4b619848a877bbdb3f07b3d883c3d3
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The heuristic 'SE_INVOICE_LURE' indicates the document attempts to mimic an invoice or payment request. The presence of many external URIs, including one to 'soxebez.ru', strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://soxebez.ru/strik?utm_term=whirlpool+washing+machine+reset PDF link annotation
    • https://cdn.sqhk.co/jadepibake/ifbtIgf/77447931357.pdfIn PDF document text
    • https://lirefabagobaxi.weebly.com/uploads/1/3/4/0/134012393/1705770.pdfIn PDF document text
    • https://ledegukumimajem.weebly.com/uploads/1/3/5/3/135393042/c21b6.pdfIn PDF document text
    • https://cdn.sqhk.co/padumaxifop/jid9Rgi/tiles_hop_3d_download.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/9cLlEr5/96406912243.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/dwthejc/electrical_calculator_free_download.pdfIn PDF document text
    • http://xigewoximil.22web.org/space_launch_system.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/IdhgxjI/12467772148.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/doigVjg/47263154244.pdfIn PDF document text
    • https://cdn.sqhk.co/lilokimoz/gejjjjx/44533648490.pdfIn PDF document text
    • https://cdn.sqhk.co/naxokujim/Ugidsia/60582866799.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/tonisefoteka/90138179700.pdfIn PDF document text
    • http://kizuwopo.epizy.com/hp_z420_motherboard_in_atx_case.pdfIn PDF document text
    • http://nanizezuzodujo.epizy.com/root_cause_failure_analysis_book.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/gowubeputoxozufurowujisub.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/8544242339.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/operation_2019_movie_utorrent.pdfIn PDF document text
    • http://bomiboduju.epizy.com/astable_and_monostable_multivibrator_using_555_timer.pdfIn PDF document text
    • http://wuzuferopo.epizy.com/abnormalitas_kromosom.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/cursos_de_marketing_digital_online_gratis_con_certificado_google.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_off0000e264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE264 5452 bytes
SHA-256: ab2bd7f59a19cd26c511e7e962fdd2c91bc4f894187b64b05dd43e2a1265eca5
font_01_sfnt_off0000f4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DB 10804 bytes
SHA-256: 04cc678c2cb0808408b83a439ce509fbb3a59a50ff86deb737dd488f317bfa83

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