Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c3175d07fb7159…

MALICIOUS

PDF

75.0 KB Created: 2021-03-13 15:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: d6e1b5eb0f569d86635dfd6c30afcbfc SHA-1: 1e5c2ef5a3be81b48c890a9493a794c46c1699dd SHA-256: 29c3175d07fb7159ed4a6e69ad7ef4ca762c10cea36e2c40e7ea4eb5a1417532
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, many pointing to disposable hosting or redirector infrastructure, suggesting a link farm designed to distribute malicious content or phish users. The presence of a link to a known malicious redirector further supports this. No scripts were extracted, but the overall structure indicates a malicious document intended for initial access via social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=neato+botvac+d+series+not+charging In PDF document text
    • http://zipafaxelati.sportsontheweb.net/how_to_fix_my_sunbeam_heating_pad.pdfIn PDF document text
    • https://wodarobasuk.weebly.com/uploads/1/3/5/3/135300597/goxixokejudiledeti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373778/normal_5feb0aad7bd2f.pdfIn PDF document text
    • https://dinadexoliba.weebly.com/uploads/1/3/6/0/136091941/nefufusoxidepu.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/norton_anthology_of_american_literature_8th_edition_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446635/normal_601b20253dca9.pdfIn PDF document text
    • https://lapokatodulobak.weebly.com/uploads/1/3/5/3/135347459/lupilimiwuxujer_tumovetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409421/normal_6011d45c14cdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454820/normal_600c610492965.pdfIn PDF document text
    • https://molavose.weebly.com/uploads/1/3/5/3/135350427/3335320.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lugifer.onlinewebshop.net/94634823776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4945ce-1027-424a-a297-0f702cb5682a/fiwafiripidadazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e39fef-27dc-454c-ae31-3e9acd3c3ab7/jim_inhofe_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8711a0f7-e73e-48df-b9ad-29a6c35b6a4b/what_does_exponent_1_mean.pdfIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_cc3e6590d24d40d2ac5d0a41b8d7a307.pdf?index=trueIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_0260428356d74480a82356f87900f644.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ff1f0b-150f-4ff2-8233-7df1e202c90a/human_resource_management_project.pdfIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_18c79e69b76542b6aa5ab1c018ab8ea2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/738ab1f3-081a-41f8-86e1-a0cac6e53026/jay_z_decoded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f0fe8f2-6c32-440a-b4a4-8264b4b4dedc/what_mens_cologne_smells_like_sandalwood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e96a04-2fda-4006-844b-8c6628d7ce32/google_maps_3d_street_view_online_pakistan_lahore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425d52c9-dc8a-4d4f-96c7-0ed758ac1d06/vusilenibokakumazesojuv.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_off0000e2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 5336 bytes
SHA-256: 7d2cf77e0bee8a50a090a84687273f06b874f9068da9bc0741638bc33b7528ce
font_01_sfnt_off0000f51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51E 12052 bytes
SHA-256: e03266971826f7fdbb1c56b4707133171f6bad731b722d6b9123b88e143e99c0