Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c01faaf6a3dbd8…

MALICIOUS

PDF

91.1 KB Created: 2020-11-17 20:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4d37cfbbe1924cb5a81ff6dd12da7714 SHA-1: 99042affdcb3cac09e727d25a983eeb5cbf74739 SHA-256: a2c01faaf6a3dbd8205af32765bb1bdcf075801e47572802026caf2afcd98348
244 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF files hosted on disposable domains, indicating a link farm likely used for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary technique being the distribution of links to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://gettraff.ru/strik?utm_term=pentagrama+musical+clave+de+sol+para In PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/padixejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5fa5dbe45802b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f873d8a108de.pdfIn PDF document text
    • https://fazulozuxili.weebly.com/uploads/1/3/4/6/134625369/pasimisoraj-levazanobivin-dijejumarawora.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/is_so2_a_ionic_or_covalent_compound.pdfIn PDF document text
    • https://fetatoba.weebly.com/uploads/1/3/4/6/134689412/dejarefolej_rupudip_mixujuvoteka.pdfIn PDF document text
    • https://jikolugoxolij.weebly.com/uploads/1/3/1/3/131379047/zaxoxopo-nedaxutofas.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/e4521751.pdfIn PDF document text
    • https://kapekutom.weebly.com/uploads/1/3/4/4/134437999/pozoxovope-zawezok.pdfIn PDF document text
    • https://giginepa.weebly.com/uploads/1/3/4/3/134389182/wanijupiletafozoxifo.pdfIn PDF document text
    • https://dopesijej.weebly.com/uploads/1/3/4/6/134612330/pavaxoduw_dadamokirugewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f95511702ebd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E18 5456 bytes
SHA-256: 318a36c90aeeb3045dacff91aec4dda0315262790bcd82c4e9f653d5079106e0
font_01_sfnt_off0001209c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209C 11996 bytes
SHA-256: 2aa7d739a2373f64f1b06a3f173f3a48bbc3b5c2f66360d1b6aebe75dc05b8b8
font_02_sfnt_off00014807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14807 16200 bytes
SHA-256: eb8728b209634f5cf0dcbccd801eedbe8bc3f4553844c4955f61b377f7da468a