Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c0838b51cb53cb…

MALICIOUS

PDF

78.5 KB Created: 2021-03-31 11:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3049c251e407907c3fd67e84122526fa SHA-1: d4fe2aec82c37b2e108d1ba70046f4db7faaa67d SHA-256: c3c0838b51cb53cb8ead71946e9c07af46ecf0d43fd97989bee87f599dc3ec87
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 for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous external URIs, with a primary focus on the URL 'https://mezovuduw.ru/wix?keyword=pound+melters+what+do+they+sell', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains keywords related to search terms, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=pound+melters+what+do+they+sell PDF link annotation
    • http://ninujovapazolo.iblogger.org/24803968660.pdfIn PDF document text
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/6351950.pdfIn PDF document text
    • http://classicalnaturally.com/moxilatufaasd1.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/ib3w7hg/cafeland_world_kitchen_for_pc.pdfIn PDF document text
    • https://fupegaketivira.weebly.com/uploads/1/3/4/8/134887529/3456520.pdfIn PDF document text
    • https://zafapuguma.weebly.com/uploads/1/3/2/7/132712217/8537df7929be284.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/jgjhdgf/633204197.pdfIn PDF document text
    • http://nikecortez.net/juego_busqueda_del_tesoro_gratisx405y.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/loxawenularinekadu.pdfIn PDF document text
    • https://furadigiwib.weebly.com/uploads/1/3/1/4/131407367/89818.pdfIn PDF document text
    • http://mavogevuz.getenjoyment.net/49803125776.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/OjcwhhS/anti_terrorist_shooting_game_mod_apk.pdfIn PDF document text
    • http://zowogusatutojus.mywebcommunity.org/desorden_alimenticio_en_adolescentes.pdfIn PDF document text
    • http://tigixupog.22web.org/vulawurejerikalusupeg.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/cZCEjjt/talking_flowers_maldon_website.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/c865ced6d721ca6.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/hdgigQH/howard_wolowitz_best_moments.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zugutixe/html_to_converter_api.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/organic_chemistry_app_free.pdfIn PDF document text
    • http://jopubulebava.rf.gd/where_is_the_battery_located_in_a_2020_chevy_traverse_2011.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/video_klip_westlife_my_love_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/sekiro_dragon_rot_guide.pdfIn PDF document text
    • http://samajusinifako.atwebpages.com/bruchrechnung_bungen.pdfIn PDF document text
    • http://numololutevib.epizy.com/wimovogitepagolena.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/angular_mat-_form-_field_default_value.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_off0000f3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C1 5260 bytes
SHA-256: 8780e359af44d775be2be5e55aab35124645e613c9239d7f5cb4e79c943a0d5a
font_01_sfnt_off0001058a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058A 11012 bytes
SHA-256: 1b9cd9dca3b7897701abb3a480fa93505813c85a904000375916b3f42c6eefb4

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