Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c35116660e97346…

MALICIOUS

PDF

76.9 KB Created: 2021-03-15 00:37:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0e7b29a3c2c44bc2b0583af99260cd1d SHA-1: 00efc21d470f4e3ca2db249580f3db1649627cdd SHA-256: 2c35116660e973463ecb34d4ef5e7a1220a93032d62f24f86ff9a78de01f7036
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further suggesting malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score point towards a phishing or trojan delivery attempt.

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://xajibur.ru/award?keyword=commands+in+linux+with+examples+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413570/normal_603158b648d94.pdfIn PDF document text
    • http://sopafekidis.sportsontheweb.net/90662760227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_6019568514ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_5fd73d0ca239f.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/AjdCKbj/trap_adventure_2.pdfIn PDF document text
    • https://cdn.sqhk.co/fanekizesedi/bie9jc1/ice_cream_truck_game_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/Zjghaha/fun_literacy_activities.pdfIn PDF document text
    • https://cdn.sqhk.co/juzosugun/2MTheQP/spiral_cut_ham_costco_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5ffabfd29b60a.pdfIn PDF document text
    • http://tajuliwelofiti.medianewsonline.com/2008_ford_escape_manual_transmission_problems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_6019b3dca096a.pdfIn PDF document text
    • http://wisatemubudu.medianewsonline.com/17560778087.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/mujevubutukoxu/job_interview_questions_and_answers_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/22213634378.pdfIn PDF document text
    • http://ralupuwegilad.rf.gd/52612664559.pdfIn PDF document text
    • http://tujogiregumu.rf.gd/remington_700_magnum_action_length.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/reforma_aeroporto_santos_dumont.pdfIn PDF document text
    • http://dujazenemelix.epizy.com/bragg_apple_cider_vinegar_miracle_health_system_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/lozomekifiga.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/how_to_draw_a_civil_engineer.pdfIn PDF document text
    • http://dusameferadulo.onlinewebshop.net/bummies_pattern.pdfIn PDF document text
    • http://xugidujesu.epizy.com/queen_size_sheet_set_target.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_off0000ef1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 5248 bytes
SHA-256: 5923beb1a3c56e3684765a7614ea83efe477a9fb2c8e55da767d16468b24778c
font_01_sfnt_off000100e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E2 11020 bytes
SHA-256: 652f868ddfdc6a999679eb06de9ce0963ad0dd6faa94e1169916b1d19246de66

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