Malicious PDF — malware analysis report

Static analysis result for SHA-256 37fa045834bacedf…

MALICIOUS

PDF

71.2 KB Created: 2021-02-27 12:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: ea18fbad1460bc96adc87c31ece4b021 SHA-1: cd497f3328cc65ce7c27c09c23a8a6bd50cd5897 SHA-256: 37fa045834bacedf67706254d41e6fdadd52451e310e372c1334a4402ca8c157
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. It contains numerous embedded URLs pointing to disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain metadata related to its creation, further supporting its role as a lure.

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://pelibifir.ru/wix?keyword=foxpro+fury+2+manual PDF link annotation
    • http://nokasosozigof.mypressonline.com/80823988966.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/10_ejemplos_de_dispositivos_de_proceso.pdfIn PDF document text
    • https://cdn.sqhk.co/fafojipedul/jeHggib/magic_beans_warehouse_sale.pdfIn PDF document text
    • http://study-english-02.space/93226053575r0wl0.pdfIn PDF document text
    • http://itclick.pro/358983616089qls7.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/average_salary_for_technical_writer_editor.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/69COheh/hitman_sniper_2_apk_obb_download.pdfIn PDF document text
    • http://naturalgood.space/old_betty_crocker_cookbook_lasagna_recipezntp6.pdfIn PDF document text
    • http://avlto.best/the_great_lover_south_full_movie6t37i.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/is_daves_bread_keto.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/gcBhidy/66855499310.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/what_is_production_weekly.pdfIn PDF document text
    • http://wotaxatumumodok.sportsontheweb.net/zoniwajuzavolarirewewixu.pdfIn PDF document text
    • http://servisvds.ru/22714384429wv4fd.pdfIn PDF document text
    • http://extrameets.fun/handloom_bed_sheets_manufacturerstuhxs.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/triangle_congruence_test_answer_key.pdfIn PDF document text
    • http://com-signto2.xyz/english_grammar_exercises_with_answers_form_2lxjga.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/tomamujuf/57964697224.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/platform_bed_full_size_frame.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/challan_no_280_in_word_format.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/15321072809.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_off0000d22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22B 5124 bytes
SHA-256: 96584972d6b769d952f8bb7c00e74099c08614eebcd5b67a852e928b228ae2cc
font_01_sfnt_off0000e397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE397 13716 bytes
SHA-256: dad84d88fe9555efb8863883fb9d050abcea449b183b47844a69681ac6e977f9

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