Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8c0a95e966da3d…

MALICIOUS

PDF

82.1 KB Created: 2021-03-29 07:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ddee2adf29bf5f08f5be4fb3a7315f7d SHA-1: d8e76c55b47a312fe7620f633881a34e88477941 SHA-256: ef8c0a95e966da3dbf67be767d041a2a0f61e2592aa4cce614e7720f2017d84a
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 phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites. No scripts were extracted, but the PDF structure itself is indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/wix?keyword=examples+of+generational+curses+in+the+bible PDF link annotation
    • https://semirenuzunep.weebly.com/uploads/1/3/5/3/135325284/4a5db0249ea78.pdfIn PDF document text
    • https://jodakinikap.weebly.com/uploads/1/3/4/3/134375895/b4e9f69154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467586/normal_604f8b80e40e6.pdfIn PDF document text
    • https://tofesozexeraj.weebly.com/uploads/1/3/4/6/134610570/4842239.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/saribu.pdfIn PDF document text
    • https://latoratepowubum.weebly.com/uploads/1/3/4/7/134713938/fudekatuk-zonejanidupug-leten.pdfIn PDF document text
    • https://zakoponuzu.weebly.com/uploads/1/3/5/9/135992890/gukijox-robadi.pdfIn PDF document text
    • http://xomofaki.getenjoyment.net/brownie_skillet_recipe_easy.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/amplitude_modulation_and_demodulation_experiment.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495858/normal_5fee736118aae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375884/normal_5fd342857ec96.pdfIn PDF document text
    • https://gekafokolasiga.weebly.com/uploads/1/3/1/3/131384301/165582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_602caa699e0a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402710/normal_6033bfe2dabb5.pdfIn PDF document text
    • https://fetezubusob.weebly.com/uploads/1/3/2/6/132681625/tomagilaxurinak-bavered-zazozowizu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_6d968999f1c944ed8699e253d65935f1.pdf?index=trueIn PDF document text
    • http://futakanawus.onlinewebshop.net/annihilation_screenplay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2dd97f7-00d4-40fe-be0e-bb974ca826d9/what_are_the_characteristics_of_a_novella.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5460165c-81ba-4f0a-9cba-ad7225f967ab/telukuxodekaromovetuvuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ad3506-9933-4944-89da-8a116db3e9ab/el_significado_de_la_palabra_guerra_de_guerrillas.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/java_an_introduction_to_problem_solving_and_programming_7th_edition_by_walter_savitch.pdfIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_3387e82d130344838061c15cebedf599.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f3ff09-806a-417f-b9f0-4a33592c1e58/20758339356.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_off0001029f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029F 5596 bytes
SHA-256: 0d7158f97fe08e15cd8e60815440abb618a0854eb4e1a55baeac92f30a8a4da6
font_01_sfnt_off00011584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11584 10960 bytes
SHA-256: b7a7df9e845a1fb6a00f1bad737910e6379d0af877d4b6a89a41f1a0ab2755f3