Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba36c8868fd02888…

MALICIOUS

PDF

90.5 KB Created: 2021-05-10 01:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 538031844d5325a7dfe160eae12df99f SHA-1: e89888fa92b1bcef05e1f3c82977cc95e3512481 SHA-256: ba36c8868fd02888b4a53a5596dd86ace3600c5bbdee8bdc9e4e50e078ba20b7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting domains and are likely part of a link farm designed to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URIs suggest an attempt to direct users to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://mezovuduw.ru/strik?utm_term=how+to+chop+samples+in+garageband+ios PDF link annotation
    • http://xodaxedepapopox.mygamesonline.org/comprehensive_dictionary_of_petroleum_science_and_technology.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/zjdI1Fa/80701384801.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/what_is_in_the_norton_anthology_of_english_literature.pdfIn PDF document text
    • http://mavogevuz.getenjoyment.net/mozeve.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/93651733759.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/bosch_1617evspk_sale.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/96319549033.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/7oGyhiy/visotusoki.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvutose/TjdjlzF/macy_s_charter_club_damask_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/k08hage/63852892921.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/8jejjic/jitijulugonijubin.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/patebavi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_d5e4e7ec37d7430a913bf99a8aea8431.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d8a8bc-98ca-4fb5-8ef3-cb35d17e036e/oracle_database_client_software_requirements_12c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b770d65-317f-4c7c-8f48-b65df449f3e6/secret_language_of_birthdays_january_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b9d9e5-1dce-486e-96ad-884a125a9bd5/webinar_autocad_civil_3d.pdfIn PDF document text
    • http://dojorunubi.myartsonline.com/escala_cromatica_teclado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e399675f-3437-4ce9-b71f-9a3fd43f53a5/dell_precision_t3500_memory_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/003a4a7f-aaae-45cb-b7a5-0a320faf511f/what_age_group_is_curious_george_for.pdfIn PDF document text
    • https://d7301f0f-9730-4f6e-9d95-601e203cb770.filesusr.com/ugd/253413_0854a12128b44fee907985702f0e3369.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8489301c-aa0e-431e-bfe9-bbe6b6cec553/tipilivasesijizel.pdfIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_e727675e62794b6fbb23a962f48eb6cd.pdf?index=trueIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/wibixerosiri.pdfIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_e9c1b493c90f45348b007dd2c6837554.pdf?index=trueIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_d7eeab2c158c4fde9fa7cca698cad351.pdf?index=trueIn 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_off00012240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12240 5680 bytes
SHA-256: 72f393a9636729bda466db4b488e8945da65ff08d625c0fdd1ed06849649beb6
font_01_sfnt_off0001356e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356E 11332 bytes
SHA-256: 310bfee963bd1ff95db5985e3cd019980267b5a7040cb3e34de4a4f06757ef5d