Malicious PDF — malware analysis report

Static analysis result for SHA-256 738c91ee9bdab9e1…

MALICIOUS

PDF

69.6 KB Created: 2021-02-19 23:20:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 72c917084a1cd6aa51a1c3a347a5c15b SHA-1: 118abeb70f856b789e651763f1bbd350992aee3d SHA-256: 738c91ee9bdab9e12074ff3897228290861d3a2313e2cf379ee7b6c43e57424d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=steve+harvey+books+online PDF link annotation
    • http://vubunojetufofi.iblogger.org/sadeba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459937/normal_5ff5824b08223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_6025cc97036e5.pdfIn PDF document text
    • http://busevabafumoje.iblogger.org/2675751264.pdfIn PDF document text
    • http://zifasito.22web.org/easy_violin_sheet_music_amazing_grace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454678/normal_600d14d6d7129.pdfIn PDF document text
    • https://kimubewej.weebly.com/uploads/1/3/5/3/135329621/dccb89e2680a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452865/normal_601a000ec6f70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_6014691d5fff6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_600c7a2ae6cc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472488/normal_6025e671c4e53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5fd3283533dff.pdfIn PDF document text
    • https://mizugoveram.weebly.com/uploads/1/3/3/9/133986338/xudugekavebaro.pdfIn PDF document text
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/kifopanotebum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418171/normal_602dfd8fa2c28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dinedolorexos.rf.gd/25869931248.pdfIn PDF document text
    • http://xakilapug.epizy.com/gewavixifavawovijiv.pdfIn PDF document text
    • http://monulaw.epizy.com/xebesazazo.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/dexidojitetekefuxako.pdfIn PDF document text
    • http://sawokemapixaf.epizy.com/rugazuxodixejo.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_off0000d427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD427 5240 bytes
SHA-256: 0a94852d4d45e0a861552222e6ced1d39961e0883741f784a7285bb024c7feef
font_01_sfnt_off0000e5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 10268 bytes
SHA-256: ffb5d83e46275b61159b7998eace73746ed810ce4f9a27e5a13acfa61d567b25

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