Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5605cfa0610c674…

MALICIOUS

PDF

118.8 KB Created: 2021-06-07 02:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7f27136348b576fc978765618aa3c4af SHA-1: a2db1406c3aa4dd0d22668e0e2c9ee1d77c98531 SHA-256: b5605cfa0610c6749bb831d1a2b5097294de11ac311c1cb136762a06f64545cd
186 Risk Score

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, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution through the linked content. No scripts were extracted, but the PDF structure itself is indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ketchas.ru/pbw?utm_term=instalaciones+electricas+residenciales+sena+pdf PDF link annotation
    • https://wotipivas.weebly.com/uploads/1/3/1/4/131482993/2737741.pdfIn PDF document text
    • https://mekufaro.weebly.com/uploads/1/3/5/2/135294947/tamil_zorezofowoxiwab_fikutawoviza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391009/normal_605713995576d.pdfIn PDF document text
    • https://zigaxedalinuj.weebly.com/uploads/1/3/4/0/134016671/gizusabajumug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450630/normal_6034285a15ff7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421943/normal_5fced54c85469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_601af6ad7179e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468871/normal_5ff12914a0bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_605fb2300a205.pdfIn PDF document text
    • https://makesagesuli.weebly.com/uploads/1/3/0/7/130740055/fivuxonolelidoxixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475383/normal_605bb9e0bd885.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bezawagiga.pbworks.com/f/sesshomaru_y_rin_fanfic_lemon_terminados.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d47509ee-90dc-4df0-a805-343c4ba76bbf/yamaha_moxf8_88-key_synthesizer_workstation_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa8b7713-dc17-4e89-a794-707083928cf7/bamumudepitomorud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4cdbfd3-2ad0-433f-8bfb-1f13eb83df49/97179898942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935328cd-ba8f-480d-a7a5-766f0509bebe/72775369457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dfbc668-6155-4a34-b2fa-2b825784d7cb/400252969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/184112c9-66f0-4a82-8e6a-a054059afbcf/high_level_design_document_contents.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea54f6d-56a0-4a01-8a00-ae1a6473add3/wamisufagevodo.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/w/file/fetch/144461487/fuwujifatoranugod.pdfIn PDF document text
    • http://rijunepupuja.pbworks.com/w/file/fetch/144562944/taribinaji.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_off000193e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193E2 5088 bytes
SHA-256: aa6df8521247fed42bfd26c396d38a8634004b24c72de94bb33a38c8762602a5
font_01_sfnt_off0001a53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A53C 11940 bytes
SHA-256: e0e0bb88ceda69532c1888dbb47cec1371bc2fd6584a46e9695469bc1681f246