Malicious PDF — malware analysis report

Static analysis result for SHA-256 091104228432eeca…

MALICIOUS

PDF

77.0 KB Created: 2020-12-16 06:10:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3046666f4192b42059d92d6d978322dc SHA-1: d17e107dbf55e54f1599c759ca1bcc28d1f18a9d SHA-256: 091104228432eecad8cd01b71f80bf9e28347187a9568a6dfe88daa677497d1c
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged this file as malicious, indicating a high likelihood of malicious intent. The primary function appears to be acting as a link farm, potentially for SEO manipulation or to distribute further malicious 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
  • 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 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.
  • 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://traffmen.ru/123?utm_term=best+buy+ipad+case+6th+generation In PDF document text
    • https://jevizaja.weebly.com/uploads/1/3/4/8/134869407/2481825.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369933/normal_5fc64495303ae.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/lubotupedu_ladukomila_xanixef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5fb2f2517a512.pdfIn PDF document text
    • https://rizadubarezesul.weebly.com/uploads/1/3/4/4/134499036/xubitidukavurumipe.pdfIn PDF document text
    • https://wuzakuxiletidu.weebly.com/uploads/1/3/4/3/134322166/fomigilunabep-zoxuliwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5fd13af344c44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_5fc2687513af8.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/xabuna-gipegek-vipubolatux.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/mifakosawafisadipop.pdfIn PDF document text
    • https://bibatuzasofobi.weebly.com/uploads/1/3/4/8/134879938/a7ea43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_5fa89299139be.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/vavapekadoliti/jazulumonakosumez.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF48 5748 bytes
SHA-256: 4cd30cb18b2fad332cb46ad4165b7446f64c0feaf15354a8c2e966fe7b534fa6
font_01_sfnt_off000102d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D5 10772 bytes
SHA-256: 21a59a9efe39369756b16517ee7d831afa792ffab3adbc6fa257413ba4ecd912

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