Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf23f32a264ddc5a…

MALICIOUS

PDF

73.2 KB Created: 2021-02-26 02:49:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 06593cf06674c618257ddf096d859ff1 SHA-1: d55f29767669803cb52c33c46e843059d1dc34de SHA-256: bf23f32a264ddc5a92162a1d2d083af02d06259800640ff2915a8c353330547b
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

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://seumenha.ru/aws?utm_term=craftsman+lt2000+lawn+mower+battery PDF link annotation
    • https://cdn.sqhk.co/zukuxenopo/vC7FLie/99667563335.pdfIn PDF document text
    • http://kowezuzapine.66ghz.com/10517372570.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwufeguv/iriiZgf/rowivotirarolosuduvurek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384644/normal_5ffdc56a7781a.pdfIn PDF document text
    • https://cdn.sqhk.co/tawakejolap/h3XPehi/download_flip_trickster_parkour_simulator_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/XtjbYig/wepaze.pdfIn PDF document text
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/3092849.pdfIn PDF document text
    • https://sudovirikil.weebly.com/uploads/1/3/0/7/130739802/2420023.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/dirt_devil_handheld_carpet_cleaner.pdfIn PDF document text
    • http://lolurisufetofel.epizy.com/pakemilekajuvigepaladinim.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/tetomivoneraropav.pdfIn PDF document text
    • http://xofududegotu.epizy.com/vertex_form_equation_definition.pdfIn PDF document text
    • http://petilawunabebi.epizy.com/44248876009.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/67207015620.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/ronuwisajuluwazixejefadal.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_off0000e03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03A 5428 bytes
SHA-256: 483827fe37c485f2e7b279fcc1085aacbf5c4fcb73b3248197b21619b94d4758
font_01_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 10460 bytes
SHA-256: d9fc21bc85d91e628c9544f59053ae02e4263acb70bdcfcf129a08915cb8a60e

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