Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a418e8c4980222…

MALICIOUS

PDF

75.1 KB Created: 2021-03-17 23:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b1da5444ae4041cb9106806c777d5749 SHA-1: 2d5beafc44b4dbdd6f6d06a5e67480ef9691be4c SHA-256: b0a418e8c4980222baf7c914fe0b2dc4dc6c0174856c3221208b5a55e7f5c5b8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous external URIs, with a prominent one pointing to 'seumenha.ru', suggesting it's part of a phishing or malware distribution campaign. The document body is heavily obfuscated, but the presence of embedded URLs and the overall structure strongly suggest it's designed to redirect users to malicious content.

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://seumenha.ru/aws?utm_term=the+one+thing+pdf+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424328/normal_5fdb8e017c765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422135/normal_60333b1ed5788.pdfIn PDF document text
    • https://cdn.sqhk.co/wivenute/bQhWzic/top_scorers_nba_all_time_espn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412379/normal_6026b263c1190.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/NIgiKPU/zombie_diaries_2_full_movie_free.pdfIn PDF document text
    • http://lagajakazevo.22web.org/jeziwop.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/pipiso.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/best_biology_notes_for_ssc_cgl.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/gcjhA45/wexigifuji.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/2090363598.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/jhhiIqa/jopetuxikukivumu.pdfIn PDF document text
    • http://zedateve.mypressonline.com/self_determination_theory_psychology_today.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogoxuf.atwebpages.com/proses_pembentukan_hematopoiesis.pdfIn PDF document text
    • http://ninamutarat.epizy.com/lombrices_rojas_californianas.pdfIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_94c0277e1d04496491e30b4423269ba3.pdf?index=trueIn PDF document text
    • http://jelolit.epizy.com/38202709948.pdfIn PDF document text
    • http://juborekif.atwebpages.com/adjectives_to_describe_appearance_and_personality.pdfIn PDF document text
    • http://watusatuvor.myartsonline.com/loxodimebibu.pdfIn PDF document text
    • http://giworutiw.myartsonline.com/gaworejikizasem.pdfIn PDF document text
    • http://zimofizamar.epizy.com/taxonomy_of_plants.pdfIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_eeb2f1758eeb45b785382b8211f78f1d.pdf?index=trueIn PDF document text
    • http://seroroxunabolu.onlinewebshop.net/pafalepemowoxuwo.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_off0000e824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE824 5476 bytes
SHA-256: 4cd34d40026caf74a8dc3a7f80ae3457fe80f6e37c01fa133b15d6d7474675d0
font_01_sfnt_off0000faa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA8 10744 bytes
SHA-256: 065aa7dd128296ab809ccd122b233caf82fc8d41d3470845fde20b59da9aedf1

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