Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b28196cb81941c…

MALICIOUS

PDF

77.4 KB Created: 2021-04-08 08:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f5c5ca0ece81a1ff7d6b2656d5cc363 SHA-1: e3b324fd82daed1e0e26f6c8789798c99377a914 SHA-256: 66b28196cb81941c1e2f4bfa17edeb8732020bb9925548683ee11b5a0de8ad14
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or unknown domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/strik?utm_term=how+to+take+apart+sleep+number+adjustable+bed
    • http://austritkfa.com/weil_mclain_ultra_series_2_error_codesuson5.pdf
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/1644635.pdf
    • https://sulagumafiwez.weebly.com/uploads/1/3/1/3/131383207/dowidojibudev.pdf
    • http://beamorem.com/python_list_remove8snj0.pdf
    • http://vakodilaxen.iblogger.org/dwarf_fortress_lazy_newb_pack_graphics.pdf
    • https://buvurujexo.weebly.com/uploads/1/3/6/0/136082217/vinasanawuxo.pdf
    • http://mazipuvaxa.mywebcommunity.org/xipuzanakereg.pdf
    • http://wugilunage.iblogger.org/term_loan_agreement.pdf
    • https://morimisinasezub.weebly.com/uploads/1/3/1/8/131856414/falevenaza.pdf
    • http://veruvipavopa.getenjoyment.net/12942076208.pdf
    • http://lafowesezojo.scienceontheweb.net/bliss_point_economics_optional_notes.pdf
    • https://buserakufazuwus.weebly.com/uploads/1/3/4/0/134097478/lowetimar_rinekosaj_tisufogupomu.pdf
    • http://lazerepil.site/how_to_reset_traxxas_tqi_receivermwqd3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sevoga/51939173326.pdf
    • https://uploads.strikinglycdn.com/files/377a81c6-0cb5-4a3e-b7b2-973d17435d9d/black_and_decker_cordless_drill_with_2_batteries.pdf
    • https://uploads.strikinglycdn.com/files/499c1d45-c481-4ea1-93b2-848a82dffc76/zoxovapatomawolutebax.pdf
    • http://guxejusoselota.myartsonline.com/que_son_los_antecedentes_personales_patologicos.pdf
    • https://uploads.strikinglycdn.com/files/d0cd6f17-16e5-4e5e-b1fc-0f63ced4ba00/is_the_esv_or_nasb_better.pdf
    • https://uploads.strikinglycdn.com/files/fae4e3a3-8ab3-45c2-afe2-596cfc388f0f/english_vocabulary_games_online_intermediate.pdf
    • http://kigaxaxoguwebu.rf.gd/fupuwexofesuledim.pdf
    • https://s3.amazonaws.com/baxegezivumi/jidolutojebif.pdf
    • http://nisoruv.rf.gd/how_to_solve_multiplication_by_vedic_maths.pdf
    • https://uploads.strikinglycdn.com/files/75a4a2b8-e0bd-4eed-a88a-a915961ac044/how_to_answer_summary.pdf
    • https://s3.amazonaws.com/mukutud/how_to_use_food_waste_bin.pdf
    • https://s3.amazonaws.com/vigevot/65191011365.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f020.bin
d9f6c71fbf4fb4d819f86b0a722a27ce24f22b2009b171e1feb662075318c67d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 5436 bytes
font_01_sfnt_off00010291.bin
99518193cfde4db3c4b1248426c7b6367fca6e73016d1980f942bc63e58c3e4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10291 10984 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.