Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba17bcc6b8bdf9b…

MALICIOUS

PDF

71.0 KB Created: 2021-03-25 13:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b76949be06479ffe77cc6b0fabd5c961 SHA-1: bf24c5b9acb8643a42d6d18f99c078bc18559576 SHA-256: 1ba17bcc6b8bdf9bcabba992a95e29802f21d19d091cfe5701dc60505ca138cf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary external URI pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=azar+fundamentals+of+english+grammar+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481406/normal_5ffd3ff327c54.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/get_tough_approach_to_crime_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/ggjhiiQ/sarkar_infinite_apk_revdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424985/normal_60559baab037c.pdfIn PDF document text
    • https://cdn.sqhk.co/siripeka/4gjjjjf/mindustry_schematics_android_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tupizurelir/figXjbI/best_jump_scare_movies_on_netflix.pdfIn PDF document text
    • http://rabifew.iblogger.org/bukovafubunut.pdfIn PDF document text
    • http://jepegupunu.mygamesonline.org/72138515696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_601a7fd5dad9f.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/vubamobupem.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/jujevosezubutevi.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/vupogubowilow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464541/normal_6022875e7d11a.pdfIn PDF document text
    • https://cdn.sqhk.co/bosareke/gShhhia/download_neon_hockey_mod_apk.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
    • http://labopum.rf.gd/sidevijaguliwir.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/anterior_spinal_cord_syndrome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71668418-b157-4ad0-a2ff-ca1d01e388a4/92564556201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c14ad11f-bffa-438c-8191-28a0699f521c/36346715197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6114fd1d-5e82-49fb-9bcf-56b4fa865355/how_to_program_a_panasonic_cordless_phone.pdfIn PDF document text
    • http://lodumojokexiku.onlinewebshop.net/arduino_basic_tutorial.pdfIn PDF document text
    • http://sanojepenot.onlinewebshop.net/pakeborasumekogalolewov.pdfIn PDF document text
    • http://verirajoxa.epizy.com/obusforme_back_support_shoppers_drug_mart.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_off0000cc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1C 5376 bytes
SHA-256: 79d1b218faba08fbc81e7eb1c2be4ddee0506404db6d7e1563b788422b0d776e
font_01_sfnt_off0000de40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE40 10168 bytes
SHA-256: 82142bf6937a876ead673d6ff2bf65d146642b50a6f2a8d3d8d1c9930ef0676b
font_02_sfnt_off0000fecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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