Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce3b3cf82102384…

MALICIOUS

PDF

91.9 KB Created: 2021-03-10 00:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b80dae12b83e20c03ac7b342d038f682 SHA-1: 1e6d7c901350b5218f3ca14f293317952205b7df SHA-256: cce3b3cf82102384107fa03ea0f3e3b783901d8db0c4e41c3603fdf4c35f395f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external websites, some of which are hosted on disposable domains, indicating a link farm or redirection strategy. The PDF's structure and embedded content suggest an attempt to disguise malicious links as legitimate resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://vilenefex.ru/wix?keyword=hr+audit+checklist+pdf PDF link annotation
    • https://vosovijuz.weebly.com/uploads/1/3/0/8/130813614/kasuziwovudadenape.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/best_way_to_start_tai_chi.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/shop_vac_replacement_parts_lowes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fe7685a482af.pdfIn PDF document text
    • http://gekenig.mywebcommunity.org/77809607419.pdfIn PDF document text
    • http://tesupelaj.sportsontheweb.net/formato_apa_2019_numero_de_pagina.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/60022673890.pdfIn PDF document text
    • https://taxinureku.weebly.com/uploads/1/3/0/8/130814469/75f6f951198c4b0.pdfIn PDF document text
    • https://wilepojaxuxag.weebly.com/uploads/1/3/4/6/134682450/0deae0176624e.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/life_together_fellowship_appleton.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495841/normal_603c4cfae9874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_600fbad652121.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_5e2833ba5f1f4500b3630e2e5e84fa48.pdf?index=trueIn PDF document text
    • http://bamonoxo.onlinewebshop.net/libro_de_fisica_3_secundaria.pdfIn PDF document text
    • http://nixomirorubu.myartsonline.com/graphic_design_software_for_mac_full_version.pdfIn PDF document text
    • http://fetekovabu.onlinewebshop.net/how_many_seashells_links_awakening.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_2e4ba3ca9d8a42f986cef64515802fa7.pdf?index=trueIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/48321105514.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_off00012c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5D 5268 bytes
SHA-256: 2964849807f6f02e8bb4d57d95aa6e34df32c9e7e92bb11d34f6029395cccae4
font_01_sfnt_off00013e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E40 10672 bytes
SHA-256: 38467e51364ff2fe9380bb09f38aeea5dac3690881eb3ec78cb3bb7fc2ce79d6

Open this report in the interactive analyzer, or submit your own file for analysis.