Malicious PDF — malware analysis report

Static analysis result for SHA-256 692a27f310bba4a4…

MALICIOUS

PDF

81.4 KB Created: 2021-03-14 15:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f2e9bf6673f5c01f26ef5916391ac263 SHA-1: 71723783f74c8db5f2f63185a0209a5d45c583f6 SHA-256: 692a27f310bba4a49f7e6eff6fb8db0a18821344ff8236f1b6623c71e404bbe9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://jacksth.ru/123?utm_term=jarrod+radnich+piano+sheet+music PDF link annotation
    • http://balegetiwep.mywebcommunity.org/what_are_the_advantages_of_a_database_management_system.pdfIn PDF document text
    • http://extrameets.fun/launcher_plus_one_pro_apk_downloaden8b2.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/navy_civilian_jobs_2020_online_registration.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/2108773260.pdfIn PDF document text
    • http://zakemelevij.iblogger.org/bleacher_report_nfl_predictions_week_13.pdfIn PDF document text
    • http://trells.space/43837408585648re.pdfIn PDF document text
    • http://ferabugajefelam.mypressonline.com/majusatamewotitivajediw.pdfIn PDF document text
    • http://medway24.com/22859118857rqh4c.pdfIn PDF document text
    • http://rimelutafoterir.iblogger.org/why_wont_netflix_work_on_my_wii.pdfIn PDF document text
    • http://romeita.fun/lonorifewibzcnn.pdfIn PDF document text
    • http://legalvictory.group/indirect_free_kicks_soccer8oc1n.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/nonabafat/litekawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7990140-c833-42d1-bd16-4d655bf58e49/pedojoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c675f54-3820-4e5d-aaca-6444c097a235/does_marlow_change_in_heart_of_darkness.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/masterbuilt_butterball_20_lb_xl_electric_turkey_fryer.pdfIn PDF document text
    • http://ropurudowilume.rf.gd/71617872624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712cc572-e0e3-4df1-94d7-948f788cfbbf/viper_alarm_no_sound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8cabcd2-49b3-4149-a43a-add6d3bae941/nemokaketageto.pdfIn PDF document text
    • http://dawozisi.rf.gd/formato_de_solicitud_de_empleo_para_llenar_a_computadora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14cc7c0c-bb36-4b9e-bb4a-514e3abab6d6/microsoft_excel_training_course_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/attack_on_titan_season_4_how_many_episodes_total.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/56711419341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2ead04-8150-400c-9d7a-4e4114961e70/como_se_llama_la_iliada_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/my_ambulance_ep_1_eng_sub.pdfIn PDF document text
    • http://tinipukax.epizy.com/web_development_quiz_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c08472-8be4-4fae-bd1d-b1c4278488ee/how_to_maintain_a_heat_pump_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00560185-baa5-4b3e-82a4-d3f5b51f9dd4/how_to_clean_hotronix_heat_press.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86eb39b4-f157-4f81-a661-a11e759d9bc3/sap_user_role_description_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c25219df-46ea-42fc-959f-1e174163213d/sakomamololaw.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_off0000f18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18F 5152 bytes
SHA-256: a7f309de2ee158ffe15f2788d92ab55a9c19ca6580e7dd56a68cbf6afecd7c40
font_01_sfnt_off000102dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DD 11176 bytes
SHA-256: 63b847015e1f0b801378c054bbfc35a22eb919f2500692b5d44556a606068f48
font_02_sfnt_off000128cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c