Malicious PDF — malware analysis report

Static analysis result for SHA-256 7778ef00ed092161…

MALICIOUS

PDF

93.5 KB Created: 2021-05-01 16:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1c1f9ebc8d3dad1453b29d515c28eb35 SHA-1: b65e801300ff48dc8e0641d9a3f9e687f77dcc63 SHA-256: 7778ef00ed0921617f680b4866a8344a07470bb06f8ba83df35d4740b6937e87
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing and malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely a phishing page or a download site.

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://fokemale.ru/strik?utm_term=what+are+some+literary+devices+in+to+kill+a+mockingbird PDF link annotation
    • https://cdn.sqhk.co/jigugabopu/Jgha2id/8218598522.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/icjb4bO/okay_kaya_bandcamp.pdfIn PDF document text
    • https://cdn.sqhk.co/nomuzali/chjmibj/gift_play_free_game_code.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/ZoiRhdV/poutine_brothers_food_truck_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/5uYhaih/smart_line_module_connection.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409623/normal_5ff40bb9eb9e9.pdfIn PDF document text
    • https://cdn.sqhk.co/bubarozotuj/Xjc1jjf/nick_carter_dancing_with_the_stars_week_11.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/jfaoyBG/dekisojalefiko.pdfIn PDF document text
    • http://discovljzg.fun/how_to_turn_on_vizio_sound_bar_without_remoteigpdq.pdfIn PDF document text
    • http://baltika-trans.com/how_to_combine_multiple_files_into_one_macxuf7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380068/normal_5fd9f1e18d0b0.pdfIn PDF document text
    • http://sweetmeet.online/how_to_structure_a_fantasy_novelbgqlx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_6010f8ae137d8.pdfIn PDF document text
    • http://mainsale.info/how_to_reboot_verifone_mx915thqw1.pdfIn PDF document text
    • http://dazinifuxevoji.22web.org/an_education_2009_full_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417817/normal_60315c82a58e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377933/normal_6058255034f4c.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/qVoqgic/school_girls_simulator_mod_apk.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/kuboki/customer_satisfaction_project_report_on_tvs.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/how_many_partners_is_too_many_for_a_woman.pdfIn PDF document text
    • http://juxugalipexobow.epizy.com/how_to_program_samsung_remote_to_spectrum_cable_box.pdfIn PDF document text
    • http://vipagepegavazus.epizy.com/xujerere.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_off00012cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC7 5732 bytes
SHA-256: b54a74933c85e2073124b22219c8c014bbf37f01fe9332a8c582f467e09a1cce
font_01_sfnt_off00014035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14035 11256 bytes
SHA-256: 532d869b68ae1cad5c0318d4c180d727cfeb33818917360f5b44d3e9803f476c