Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cba5e65c89210a5…

MALICIOUS

PDF

79.9 KB Created: 2021-04-20 14:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 749786df80c2c322fe61b1dcd058a099 SHA-1: 62797243a5491c29fda55df98c3f89751af0f422 SHA-256: 7cba5e65c89210a5d0086cc4325b86165d2777cca1de40b8b2817a0099ce208e
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to wkhtmltopdf and Excel, suggesting a lure related to data manipulation or search queries to entice clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ponafet.ru/strik?utm_term=how+do+i+only+show+certain+data+labels+in+excel PDF link annotation
    • https://cdn.sqhk.co/wakivugex/heijVih/zunasum.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/haLhcBi/the_voice_uk_coach_winners_list.pdfIn PDF document text
    • http://zumbayuliya.online/what_types_of_intermolecular_forces_are_present_in_methanol6h996.pdfIn PDF document text
    • http://hookup157.site/como_agua_para_chocolate_que_significas534k.pdfIn PDF document text
    • http://bodyita.space/nubuz2le3f.pdfIn PDF document text
    • http://good-production18.site/journey_to_the_center_of_the_earth_2008_full_movie_download4ms72.pdfIn PDF document text
    • http://barashik.space/guzutakoxuwogewoi4qm7.pdfIn PDF document text
    • http://reawont.online/que_significa_el_arcoiris_en_la_biblia_catolicacuvum.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/jdjetjg/rocket_city_trash_pandas_toyota_field.pdfIn PDF document text
    • https://cdn.sqhk.co/nanubebebot/c07iaij/underwater_stunt_car_flying_races.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/WXoiQ67/93346372640.pdfIn PDF document text
    • http://free-at.pro/65598103680kji3d.pdfIn PDF document text
    • http://dkmz3.club/3961613669404q9u.pdfIn PDF document text
    • http://instacopyrightcenter.com/what_does_the_bible_really_say_about_divorceovm99.pdfIn PDF document text
    • https://cdn.sqhk.co/dodagirojep/jaeVja8/equalizer_3_trailer_deutsch.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/aGnLha3/bezebitakonepiropis.pdfIn PDF document text
    • http://fishland.store/template_powerpoint_kerency4w8.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/9lhcibr/heroes_circle_jamaica_directions.pdfIn PDF document text
    • http://artemk.ru/blank_storyboard_template_to_printah7h9.pdfIn PDF document text
    • http://thelandofbadideas.com/zaluzixx0r.pdfIn PDF document text
    • https://cdn.sqhk.co/komifugu/hc8hdhc/angry_birds_transformers_jenga_code.pdfIn PDF document text
    • https://cdn.sqhk.co/zabeluzitema/Ugi0GLT/tisilibakilesorexiponopip.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiren/SSicQ80/biaya_perpanjang_sim_c_2019_jakarta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 5388 bytes
SHA-256: fbea454b788c0f13a06b46ba860f2763876a9fbfba7da1ec358420af4065433b
font_01_sfnt_off000107ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EA 11768 bytes
SHA-256: e7d0771197d7169206b24707c778c1aa307439e87faa334fa4a107840d924401