Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b2dc591d244267…

MALICIOUS

PDF

75.9 KB Created: 2021-06-04 11:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 33b16a6614b9f1f568114d83154b82bf SHA-1: 4888fdec52bfdf8fa7be68c35cd71f3e97fe2dd6 SHA-256: c0b2dc591d244267289fa163e954cc356e9d334829cec951d16042e7acd38186
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 0.9996

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://irlanc.ru/pbw?utm_term=pubg+song+download+mp3+free+download+pagalworld PDF link annotation
    • https://dekupepevimozis.weebly.com/uploads/1/3/0/7/130738652/xezixipusadowukuji.pdfIn PDF document text
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/5788324.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/c0d62e15aa.pdfIn PDF document text
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/kolizawe_zalunorosek_genobo.pdfIn PDF document text
    • https://ramabubutimelu.weebly.com/uploads/1/3/4/5/134597411/lekazukifukesi.pdfIn PDF document text
    • https://dubasebajulux.weebly.com/uploads/1/3/1/3/131382081/4676626.pdfIn PDF document text
    • https://zikamesezelili.weebly.com/uploads/1/3/4/8/134857079/7505272.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/dfaff0f4-02a2-4a24-9dc2-c206c5229223/36448425898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d838a7-53da-47e1-83cd-2a6d70095797/26203177517.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/19587612181.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/sepujoxedazaferurituwogov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac29c45-918c-46ee-979c-058562f20ee5/pidavewuratew.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/basic_operational_amplifiers_and_linear_integrated_circuits.pdfIn PDF document text
    • http://dejimebez.pbworks.com/f/internet_explorer_11_download_windows_7_64_bit.pdfIn PDF document text
    • http://pojaweku.pbworks.com/f/differentiate_formative_evaluation_and_summative_evaluation_with_examples.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/w/file/fetch/144499476/durga_stuti_11_adhyay_in_hindi.pdfIn PDF document text
    • http://kepigiwup.pbworks.com/f/anaconda_2_full_movie_in_hindi_dubbed_hd_free_download_filmyzilla.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/f/anycast_m4_user_manual.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/gavuxebudejanoluxazodi.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/how_to_design_cable_stayed_bridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e8d525-6c05-46a3-9430-8a250adf3e8f/the_art_of_unit_testing_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1e1681-4367-419e-936a-18b19784c178/kekevifa.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_off0000e85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85B 5760 bytes
SHA-256: db4513e923b53ed519f596ed8f7061ba94f9552bc584b8a98732a2d94c5bd666
font_01_sfnt_off0000fbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF5 11176 bytes
SHA-256: d48290b73881e011fff78a701277c6081b4f3c5daf897ce4bcb2ce52fca7fd71