Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6e5bf9fc85a7475…

MALICIOUS

PDF

78.6 KB Created: 2021-03-24 11:55:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: eb0a399c5413de594ab4225315210403 SHA-1: 21498b605f9cc23f2d3695b3670208a2170d3082 SHA-256: f6e5bf9fc85a74756e02927950abfd615c4b5200438a03d90da303772b321d95
126 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to deceive users. The primary malicious URL, 'https://xajibur.ru/award?keyword=best+app+for+pdf+reading+ipad', is presented as a search result, likely a lure for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent, likely related to phishing or redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xajibur.ru/award?keyword=best+app+for+pdf+reading+ipad PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466367/normal_5fe5946e25fdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_604fcdcb87a13.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/ijgjget/game_of_thrones_cast_season_1_episode_4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464732/normal_5ffd454fbff9c.pdfIn PDF document text
    • http://lazokiwumemo.mygamesonline.org/antonyms_dictionary_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/ahf4kjd/11602218810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_604ed3f52c267.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/jbzaTjb/bombay_chutney_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/wibezudak/ididjhz/can_i_play_chess_rush_on_pc.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/lavabivixoxix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393028/normal_5fd78b95d131b.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/ijdaJij/sidel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fegesizonavuvu.epizy.com/angry_birds_games_free_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fedbf39-145c-43b0-8fa8-a13c37f9ecd1/how_to_teach_senses_to_grade_1.pdfIn PDF document text
    • http://topajikof.epizy.com/emoji_flags_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2718ee51-1a39-4bf0-b6c2-d11a37c41c3e/vietnamese_traditional_folk_dance.pdfIn PDF document text
    • http://sabinozugi.epizy.com/osha_root_cause_analysis_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6f7fb3-81eb-4cc9-8210-565e88e5dea2/vitatujivip.pdfIn PDF document text
    • http://rejoxudirux.epizy.com/20557811354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8c4d9c-c622-4fec-8d4a-5067278abfc1/can_you_pair_jbl_charge_3_with_flip_5.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/gimagezowilagulep.pdfIn PDF document text
    • http://dejarovagozude.epizy.com/29458034771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5e64bd-0dc9-4def-83b1-e0a09d1f9c72/niveles_de_lectura_literal_inferencial_analgico_y_critico_valorativo.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_off0000f281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 5224 bytes
SHA-256: 080197b4ac2da576834ac336b656757741a3e9c0adf209ba8fcefc6afbefee81
font_01_sfnt_off00010460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10460 11488 bytes
SHA-256: bbba493aab51536bfb84f4800503993bafb0e38d7d362b8cf331ca43a9ea1e20

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