Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc67b09546477284…

MALICIOUS

PDF

81.4 KB Created: 2021-04-05 20:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b3cf441d1fff9bcd3def30342aac6083 SHA-1: b10aa800d4f34c9ae2e6514ee7c7e02876e1b12b SHA-256: fc67b095464772844a2f2575c4db50433b0c0e366ae8ddfeab39ba692c0f8d57
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=will+ff7+be+on+ps5 In PDF document text
    • http://wowunoli.22web.org/witevuvozojesif.pdfIn PDF document text
    • http://titoto.xyz/73220188900a7mbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421788/normal_5fdaf658e92cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473902/normal_5fe31aae342e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_601e3c66a97be.pdfIn PDF document text
    • http://hiziryigit.online/volisomet2991.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385230/normal_5ff7ce6ed8550.pdfIn PDF document text
    • http://promooffer.site/nuxokesajozusuqpepw.pdfIn PDF document text
    • http://ecoterritory.store/does_walmart_have_tracfones9654o.pdfIn PDF document text
    • http://prizinsta.site/english_grammar_exercises_prepositions_with_answersl07aj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5ff7d517a9fa6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/nikon_prostaff_3-9x40_efr_for_sale.pdfIn PDF document text
    • http://fogafixajusel.rf.gd/the_girl_interrupted_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/analyse_2_smia_exercices_corrigs.pdfIn PDF document text
    • http://zanoxekuniz.epizy.com/buxefomazoxijosufiralow.pdfIn PDF document text
    • http://dopepekaloza.rf.gd/gumekarozu.pdfIn PDF document text
    • http://tuwaxakinob.epizy.com/empirical_research_methods_poster.pdfIn PDF document text
    • http://jixosakotipol.epizy.com/forklift_operator_safety_training_program_11-123_answers.pdfIn PDF document text
    • http://wesukudepabu.epizy.com/assembler_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/3ds_emulator_android_pokemon.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/clave_de_activacion_de_windows_8.1_pro_32_bits_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6be68e-015c-45df-b0bc-4ac28c6ddce0/17972705990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352747a7-2d57-4bea-a5bf-da695afe0a17/82824122828.pdfIn PDF document text
    • http://direpedokelazal.rf.gd/baishe_srabon_movie_hd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 4656 bytes
SHA-256: 75fcf52c12c8f9754454e590329f8f36efc4a73f427efccfeab4a899668823d3
font_01_sfnt_off000101ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101ED 11448 bytes
SHA-256: 0a5b5e0f2f0eb49bc818d0644d81641c67e5b6823ed1b8ad3f1bef8bca7e9cfc
font_02_sfnt_off00012898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12898 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2