Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c6589e18f66059…

MALICIOUS

PDF

70.0 KB Created: 2021-02-11 21:52:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 27fbadc1571f1f6cfefce122a442ae5f SHA-1: 0f9a367b610f3e834abef720df10ef33bafe8aea SHA-256: 71c6589e18f660593e3b9637e37216dba9c6738308251fa1c3aaa02dd4d674cf
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though obfuscated, appears to be a lure related to a book title, suggesting a phishing or social engineering pretext to drive users to malicious sites.

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://crophysi.ru/123?utm_term=chapter+1-6+their+eyes+were+watching+god In PDF document text
    • http://cpatrump.com/degrees_of_comparison_worksheet_class_8o50bi.pdfIn PDF document text
    • http://nibelv.xyz/809500093496euat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480594/normal_5ff519453fd88.pdfIn PDF document text
    • http://qlemelest.online/howrse_hack_no_downloadeiu3x.pdfIn PDF document text
    • https://webunufilijamo.weebly.com/uploads/1/3/4/6/134677486/3379359.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/Ikhiigf/train_simulator_zombie_apocalypse_mod_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471691/normal_5ff7610b154f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489994/normal_5fd76b42d14fb.pdfIn PDF document text
    • https://mafizawejibon.weebly.com/uploads/1/3/1/3/131383772/6763061.pdfIn PDF document text
    • https://kifezitiwiwafu.weebly.com/uploads/1/3/5/4/135400929/921557.pdfIn PDF document text
    • http://medicinfo.online/fipodipejeregi7ngqp.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/remuv/bollywood_music_sites_free.pdfIn PDF document text
    • http://jevoxomififewi.epizy.com/free_autobiography_template.pdfIn PDF document text
    • http://boribasumagit.epizy.com/rational_expression_worksheet_simplifying_answers.pdfIn PDF document text
    • http://xojaxalevigob.epizy.com/cinemagraph_pro_crack_apk.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_off0000d4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FF 5640 bytes
SHA-256: e0e9f00dbdf261d3b803ad656523c53fb2f5ce467f38b3175a03f5b0d78376d1
font_01_sfnt_off0000e84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84F 10256 bytes
SHA-256: 61818306cd05b0886d365ced6ce5c679867a757c08e0e62cb58a75b51c4f39f4

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