Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed358689d210cfd…

MALICIOUS

PDF

93.1 KB Created: 2021-04-24 20:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6db417469f46039a1d950570665522f9 SHA-1: 40b099cf28c646c757de828c23d3a12e5539948f SHA-256: 4ed358689d210cfd23e43040199897a819e30e5447388593d2813bcbc93d9903
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm designed to redirect users to potentially malicious websites. The presence of numerous external links, including one to 'xezojetit.ru', suggests an attempt to distribute malware or conduct phishing. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=bella+linea+collection+12-cup+coffee+maker+instructions PDF link annotation
    • http://fanogizakelime.iblogger.org/employee_grievance_form.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/FhgLjiC/ultimate_lightning_mcqueen.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/beginner_guitar_music.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/VM16Uhb/gegukunapufonodunelajubo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/01401a2c-3b38-42fd-aa98-1c3f874da39f/16323475972.pdfIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_b7d6dae6c0bc46778a1d4bbc9bc2e843.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe7edf0-4c6e-4115-8e78-c63cea772c5d/cloudy_with_chance_of_meatballs_cast_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32aabe75-f746-4b8d-a4a5-78b78c4ae838/whipping_girl_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27d9d65-58cd-455f-ba93-f61e3d72bc70/76624654447.pdfIn PDF document text
    • http://rafazusasune.rf.gd/surat_yasin_dan_ayat_kursi_lengkap.pdfIn PDF document text
    • http://noworevapetero.epizy.com/70733712736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c56fbd-4d86-4d17-96f9-8faac28fc94c/vusirolubaxo.pdfIn PDF document text
    • http://woxebolinos.rf.gd/dewalt_735_planer_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d576a5d-1e37-434d-bee1-12a29af0fbec/what_is_the_main_message_of_the_little_prince.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ebc6de-9faa-498e-8e20-e91ec5767c34/how_to_pair_jbl_flip_4_to_iphone_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb964706-eb9a-49f1-b096-d5311e3a3163/lozidefokesivuwes.pdfIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_eef1e932e22f4697b292707f1936a17d.pdf?index=trueIn PDF document text
    • http://larojoxejatu.epizy.com/budapest_public_transportation_map.pdfIn PDF document text
    • http://xugonowelimije.epizy.com/46277366650.pdfIn PDF document text
    • http://pizibajavodup.epizy.com/hsc_result_marksheet_2019_jessore_board.pdfIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_f87416075d2f48edba6ad95d33a190e7.pdf?index=trueIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_d0dee7f33735473e97b54e18a70006ac.pdf?index=trueIn PDF document text
    • http://zubeleboju.epizy.com/banting_diet_7_day_meal_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9ab84c-aa39-4510-9af0-8e537c1c1e28/what_rich_dad_poor_dad_teaches.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_off00012dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD9 5492 bytes
SHA-256: b155052a02ca3c8fea6c001c62a881dffefd84e3042e2477c1674c5d6b1a9313
font_01_sfnt_off00014084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14084 10784 bytes
SHA-256: 0e5ccb7c65cbcddd40578ba07c349af9381353717bf42a72cf4218c722c9d4eb

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