Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cfe06a7e4e0632f…

MALICIOUS

PDF

79.1 KB Created: 2021-03-22 23:54:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4783a2649234ca5ca7a4d81bd52c46da SHA-1: 534733075182652b151432427d3b6826c157264d SHA-256: 4cfe06a7e4e0632f50e61c5063fadbc2b1580ebfd38ed73ff8bdb48d93af3163
186 Risk Score

Malware Insights

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

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 0.9998

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://lozipotod.ru/strik?utm_term=joker+leaked+script+download PDF link annotation
    • https://femanutokit.weebly.com/uploads/1/3/3/9/133999532/47f6902578fa4.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/07d234974432c25.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/ycigjgS/sandwich_spot_menu_san_jose.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/iaY4ggs/27044029586.pdfIn PDF document text
    • https://jawoxaze.weebly.com/uploads/1/3/0/9/130968973/fazuxarirudedurevo.pdfIn PDF document text
    • https://cdn.sqhk.co/bataseset/rC8ggDy/39208466857.pdfIn PDF document text
    • http://novinove.iblogger.org/movie_ticket_booking_app.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/TQicxgi/audio_pro_speakers_singapore.pdfIn PDF document text
    • https://watuluvijigu.weebly.com/uploads/1/3/3/9/133997483/pijakup-gezufavuxa-runalebajeri.pdfIn PDF document text
    • https://cdn.sqhk.co/jovakuki/H9hb7RM/bangla_natok_romantic.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://uploads.strikinglycdn.com/files/394a458e-29ca-403f-ab3e-336c3de89ec0/xulurata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a7c46a1-aa6c-4e1b-a790-c3d31d8e6fb4/nikon_d4000_specs.pdfIn PDF document text
    • http://xoxijapemekiseg.epizy.com/day_of_infamy_speech_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe53927-a574-4ee4-a6b8-0eebc1f7320a/sector_de_alimentos_y_bebidas_en_mxico_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba1f169-6339-43aa-8736-c31bc545879d/my_passport_ultra_wd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49324e74-0375-4f05-96c8-9d29a11525bf/24235421621.pdfIn PDF document text
    • http://dajidagetulawu.epizy.com/82350006443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2f5b95-5f9a-4e08-8b3c-2162975d98bb/the_wahls_protocol_cooking_for_life_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4adc9550-3d9b-471a-88f9-e54a06ac1bc4/67935969376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e216be51-5fd2-4796-9956-54733d343d2f/66209204711.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_off0000eb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB96 5000 bytes
SHA-256: 82323b875ad0eaec1f87b94860ba61a59963e9b92055c8e576075c71802aa9b5
font_01_sfnt_off0000fcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB3 10724 bytes
SHA-256: 55f16da76933074fe5ed7b77ff79659ef9f2638bb85edac0e03758f04ae7171f
font_02_sfnt_off00012135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12135 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378