Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4afaa3335f75460…

MALICIOUS

PDF

77.9 KB Created: 2021-03-07 06:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: e3b03c7b1a63e87dbea486ac54b296c8 SHA-1: a75626f22257af5ae407848fab7da28cee1fa20b SHA-256: d4afaa3335f754605d563df0d932ab533d4950289f2b65b82dae21ebbf786ccb
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating a link farm and an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to downloading software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://soxebez.ru/strik?utm_term=how+to+download+minecraft+java+edition+for+free+on+windows+10 PDF link annotation
    • http://1freedom.space/knowledge_base_html_template_nulledfzf7r.pdfIn PDF document text
    • http://liolika-rsya.ru/114808837130by15.pdfIn PDF document text
    • https://felonuwonab.weebly.com/uploads/1/3/0/8/130814100/pomut.pdfIn PDF document text
    • https://semukozev.weebly.com/uploads/1/3/4/4/134493414/temodati.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/8c3c1c97-c617-4b16-8f3e-500b902eb27d/learn_telugu_through_hindi_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/44186762327.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/ms_sql_server_2008_express.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/pixafopijon.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/application_of_mathematics_in_civil_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/fofeludodiridubulumaku.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/72208620454.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/beautiful_scenery_wallpapers_for_desktop_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7755a9f8-6c47-43a1-bcaa-b8bcc894f017/minn_kota_ulterra_trolling_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dbc4ec9-7891-4b64-8eba-134275775328/xisedativenesagevelelupan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a247e9f7-3ae6-4313-a29b-928c2e0a5b22/lazizogezaseve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/081a8e32-0df2-4865-ae98-4c840bc040dd/definition_of_human_error_in_aviation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c8d5a48-6665-476a-93fc-8a83f4c43270/popogavanosesuwipasude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554f641e-40bd-4dfc-bb0b-3ca547f4a053/librecad_autocad_commands.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/lubamiman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1477df-be6f-40da-9cef-af15d72b4830/relevuboxovunibudufe.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/xefubureririwuwo.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_off0000f4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D7 5548 bytes
SHA-256: e70462214d159505ca77d48b995a125cf2150ad5497071b5f485fbff80a57e22
font_01_sfnt_off000107bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BF 9920 bytes
SHA-256: 179af14d6125cb49204939175b2729c5898504d488bf5c9f32bc3c3863d54110

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