Malicious PDF — malware analysis report

Static analysis result for SHA-256 0655bab8bc71474c…

MALICIOUS

PDF

77.4 KB Created: 2021-02-25 21:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 230898b2715c95b8615cddc4bf0d50cf SHA-1: 3e1a88ff19815ad0b7184695e6809010923fd5da SHA-256: 0655bab8bc71474c39c041da36a4ebf10e5666379feaabf9962b136f0704a973
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the structure of the PDF point towards an attempt to disguise malicious activity as search results or informational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/123?utm_term=how+to+fix+beats+solo+3+headphones+ear+cushion PDF link annotation
    • http://nigavereke.mygamesonline.org/45767777733.pdfIn PDF document text
    • https://nufomesamibu.weebly.com/uploads/1/3/5/3/135332564/bivunujofoj.pdfIn PDF document text
    • https://pezibufanijazox.weebly.com/uploads/1/3/4/6/134639202/3f8fc6175e.pdfIn PDF document text
    • http://jetulugu.iblogger.org/epson_perfection_v370_scanner_specs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495684/normal_5ff00383ccd54.pdfIn PDF document text
    • https://visuriteja.weebly.com/uploads/1/3/5/3/135323353/f01d72ef838c.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/kenmore_ultra_wash_quiet_guard.pdfIn PDF document text
    • https://kujarubokaja.weebly.com/uploads/1/3/4/5/134590089/911010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406771/normal_5fc9befe322eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419650/normal_5fcf6b9c4790f.pdfIn PDF document text
    • https://xadadoroz.weebly.com/uploads/1/3/6/0/136024884/54e5aeff52.pdfIn PDF document text
    • https://joxalazugadono.weebly.com/uploads/1/3/1/4/131437099/fukuxitan_lakokeb_venupagave_xejukavipo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/wizards_of_the_coast_pokemon_booster_pack.pdfIn PDF document text
    • http://sejojoxo.epizy.com/vsepr_theory_practice_worksheet_with_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09C 5668 bytes
SHA-256: 531efefee82fd23b693d3d98c8c6a00ca3cf54d21bbd2fe2269d3ff7198b5d64
font_01_sfnt_off0000e3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E8 2212 bytes
SHA-256: 1069683a7005f795876a59f23e09ddf8ae3944727b1c309112c4b81e89745742
font_02_sfnt_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 10456 bytes
SHA-256: 8a5c21f77c2173737b294a55a35025239fd69551b638db0ce952dc0cbfb3719e
font_03_sfnt_off00011201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11201 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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