Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5f280a9abb0a6f…

MALICIOUS

PDF

72.7 KB Created: 2021-03-30 02:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 018ac3899dbc7cadfb6539cd5045f62d SHA-1: de628a645d1fef9613b76578f7e2a52a7e43f198 SHA-256: 5d5f280a9abb0a6f90b94e67e62a43ca9b11ecf3310f8b715464446d02595776
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to movie search terms, suggesting a phishing attempt to redirect users to malicious sites for further exploitation.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=escape+from+alcatraz+movie++hd In PDF document text
    • http://zokuzovabodoloj.22web.org/news_world_report_rankings.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/1jbicdh/81159216072.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373004/normal_5ff3a312291fe.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/HifTcjg/12552294125.pdfIn PDF document text
    • https://cdn.sqhk.co/buzovegom/dqgjjjH/13226624372.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/dQl1jiK/dwts_2020_scores_week_5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413108/normal_6007466640ba4.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/Sthhygh/jutoditit.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/e4hXTgi/zuxasasurokujur.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/9D3Xhji/jexozexemebikulixe.pdfIn PDF document text
    • http://dotasif.iblogger.org/addition_subtraction_of_integers_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427313/normal_5fe40e9f1beee.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/hicjcij/lerijadibag.pdfIn PDF document text
    • https://cdn.sqhk.co/gajamomol/Nhhfwgh/business_system_design_document_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_601bdd1402371.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/legobegutulo/86729922885.pdfIn PDF document text
    • http://tumitodutib.rf.gd/34199427626.pdfIn PDF document text
    • http://pebotavafusu.epizy.com/couples_retreat_full_movie_free.pdfIn PDF document text
    • http://jipawivenuzinu.rf.gd/87275656658.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/32303085863.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/pawilemugeju.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_off0000da97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA97 5464 bytes
SHA-256: f28229357676746a7702388016eab7e4b0083333ca8132e173d44d104fa074c7
font_01_sfnt_off0000ed1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 11596 bytes
SHA-256: 0316a1c81f3f7fc60a12d22ad63d08a8cfe413a36b86d1a09c9c4cea4c5dc68f

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