Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50d412e487e1c37…

MALICIOUS

PDF

96.4 KB Created: 2021-03-26 06:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 43c708680c17cc1bf674331c8a7221d7 SHA-1: dc085f9de3c74322ae7d658ee2849d1088660356 SHA-256: a50d412e487e1c37c053191d6518f06f2a66474912a1e91f37f55f1834ed390a
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, strongly suggests a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains metadata related to PDF generation, further supporting its role as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=peter+drucker+management+tasks+responsibilities+practices+1973 PDF link annotation
    • http://reduslimitaly-ufficiale.site/asterix_e_obelix_cartoni_animatido684.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/welodq1tis.pdfIn PDF document text
    • https://nikulagoronol.weebly.com/uploads/1/3/2/3/132303117/1d791fcd4.pdfIn PDF document text
    • https://xowitato.weebly.com/uploads/1/3/0/7/130776358/sibukajatolig.pdfIn PDF document text
    • http://canonsburglake.org/la_la_land_piano_sheet_music_free_easyf35x1.pdfIn PDF document text
    • https://riguniliwegab.weebly.com/uploads/1/3/5/3/135342973/fc7394.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/Zp4kKhj/pafaxufatumasujuxaze.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefoveniri/gjjheij/guidebook_definition_in_business_plan.pdfIn PDF document text
    • https://mokadipubozot.weebly.com/uploads/1/3/2/3/132303064/pazobudosibogolojo.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/ggjMuxe/willow_tree_my_new_baby_blush_figure.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/49458414029.pdfIn PDF document text
    • http://triple-doska1.club/free_bill_of_sale_template_for_carw85ki.pdfIn PDF document text
    • https://cdn.sqhk.co/leguzufaju/bvgRZcE/dictionary_append_c.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/33725269658.pdfIn PDF document text
    • http://vehicleusains.com/seth_material_podcast6o8x5.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/phonics_games_worksheets_free7o2nd.pdfIn PDF document text
    • https://gowobokibisalo.weebly.com/uploads/1/3/0/9/130969305/janapokokabora.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapilejebuvone.atwebpages.com/halloween_activities_for_kindergarten.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/sogidopipenubi.pdfIn PDF document text
    • http://xadamun.epizy.com/bessacarr_e425_manual.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/nexovekek.pdfIn PDF document text
    • http://muzafevabuma.rf.gd/zetawunagokexip.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B3 6048 bytes
SHA-256: f8be814dcb9bce9f00cb2a96c5ce6e421a97e708114d8fddea44381d1d83801b
font_01_sfnt_off00014b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3B 12120 bytes
SHA-256: 74c5c07baaa4a232d1eec344a1b054759bfa212f802051f5c09793e7735772d9

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