Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaccf3b2de9dd27b…

MALICIOUS

PDF

78.2 KB Created: 2021-02-11 15:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7ae03baf4b1a6b29dfb381b3ff0afd73 SHA-1: b157c9546d3a505ab91870246349c7676b4a7af0 SHA-256: aaccf3b2de9dd27beaa49ea89e3c7d34905ae7797816f0bfa0a00bc3d52310bc
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The embedded URLs and the document's structure suggest it is part of a phishing campaign, likely attempting to redirect users to malicious sites for credential harvesting or further malware delivery. No scripts were extracted, but the presence of numerous links and the ML classifier output strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=bypass+online+surveys+to++a+file In PDF document text
    • https://pibigetikuke.weebly.com/uploads/1/3/5/3/135387636/wilogaxegi.pdfIn PDF document text
    • https://suzeziji.weebly.com/uploads/1/3/0/7/130739492/4191516.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414860/normal_5ffa8763d96a4.pdfIn PDF document text
    • https://pitazifuriza.weebly.com/uploads/1/3/0/9/130969431/lipik-wetebisev-sutifofemakugim-luravegenusux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373016/normal_6004e7f3c2659.pdfIn PDF document text
    • http://vofovadero.22web.org/25979806733.pdfIn PDF document text
    • http://gewewenaso.iblogger.org/buffering_and_spooling_in_operating_system.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/board_size_and_firm_performance_literature_review.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/xumebiwelelusesugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_600a01fb3b0b2.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/tuzodose.pdfIn PDF document text
    • https://pafebexazare.weebly.com/uploads/1/3/1/1/131163914/564269.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450350/normal_5fe51a508bd4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lujebanamof.epizy.com/training_calendar_template_word.pdfIn PDF document text
    • http://korimuf.epizy.com/riwux.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/8608966212.pdfIn PDF document text
    • http://moretavumafoge.epizy.com/47805427302.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/hasbro_bumblebee_transformer.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/xidarifojadoxopilelig.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_off0000f459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 5108 bytes
SHA-256: f680263156229ce307acbc3f9d7d3e9718a00aa9559b7479eb05c191d5b1a73d
font_01_sfnt_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 11044 bytes
SHA-256: 3c0c37fcb38e5013783c4e07e2f6eeac8609f7381e9dc6fb5968d801165ec915

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