Malicious PDF — malware analysis report

Static analysis result for SHA-256 0712759bb04776c3…

MALICIOUS

PDF

75.8 KB Created: 2021-02-26 13:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 93ec7bc8b15b2aab22aa6766eac61686 SHA-1: 7e8d6abe4f4168cbbbedd104e3f894fc96291878 SHA-256: 0712759bb04776c3515e18647a86b11bb488e3f4325bc89bf4c8cb36e41ae06e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and one specifically using a UTM term that suggests a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users.

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://nipisod.ru/123?utm_term=cuanto+mide+3%252F8+en+milimetros PDF link annotation
    • http://leledup.mypressonline.com/fezukevekipowib.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/55593496272.pdfIn PDF document text
    • http://paselon.getenjoyment.net/xunilepozinogasa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xologikaju.atwebpages.com/bissell_proheat_plus_no_suction.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/94963498002.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/universidad_del_pacfico_carreras_y_costos.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/21763042618.pdfIn PDF document text
    • http://medipebep.rf.gd/descargar_concordancia_biblica_strong_gratis_espaol.pdfIn PDF document text
    • http://fotexamaluvim.epizy.com/kingsman_the_golden_circle_full_movie_download_in_hindi_480p_bluray.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/destroy_all_humans_pc.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/how_to_teach_basic_paragraph_writing_2nd_grade.pdfIn PDF document text
    • http://babijegogaluz.epizy.com/56415797367.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/akai_mpc_2000_samples.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_off0000e498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE498 5272 bytes
SHA-256: 50a043996fa7f25c32bfc3e21650ee734e9fe30067c7f52e07311fdacf8ab628
font_01_sfnt_off0000f666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF666 13708 bytes
SHA-256: c440834b845281094f43251d5b4365f2e7fbf0ab63f04c645759f46baeab3272

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