Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd0261d1a371671…

MALICIOUS

PDF

148.3 KB Created: 2021-04-02 04:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9d4273342e670e08a08a84caeffee8cd SHA-1: 80202659c5f926113c2d81a43bbe632a46d449f3 SHA-256: edd0261d1a371671b08424dc5485574c9b1f24935667ed7e5781ba4792df5c0b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9961

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://maypoin.ru/wix?keyword=patricia+kennealy+books PDF link annotation
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/4ca1740553f614.pdfIn PDF document text
    • http://kismyketio.com/zezasuvolosxnf3j.pdfIn PDF document text
    • https://pazomanu.weebly.com/uploads/1/3/1/0/131069777/tunojokebikob_pebix_zulivivezixita_borabe.pdfIn PDF document text
    • http://vinnipoh.fun/3180447811cppz4.pdfIn PDF document text
    • https://jenisevemib.weebly.com/uploads/1/3/1/0/131070602/5937084.pdfIn PDF document text
    • https://jivikusobule.weebly.com/uploads/1/3/5/3/135326696/lusesozipoluwa.pdfIn PDF document text
    • http://bumadodari.iblogger.org/what_is_knowledge_in_nursing.pdfIn PDF document text
    • https://mediwamogapani.weebly.com/uploads/1/3/5/3/135318379/lojoxezan-viraworewelafuj.pdfIn PDF document text
    • http://reduslim-ufficiale.website/38983728037hy9wp.pdfIn PDF document text
    • http://discout.online/witezimudaxotataduvobisb3haf.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/f2f256d5-da9b-4097-aed9-0a0f61c9cefd/what_jobs_can_you_get_with_a_bachelor_degree_in_international_business.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/square_root_and_cube_root_graph_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/gazitakanusunuwog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b02a6247-6ccf-4e9e-aace-997b3131d965/bolinenubotobosege.pdfIn PDF document text
    • http://kepatuzazavew.epizy.com/excel_dashboard_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9380f3da-387c-408b-b047-9f2f7f21cdb9/jamelerufuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3d0b75a-bf22-4943-ae24-bedefe36557e/what_are_the_national_occupational_standards_for_teaching_assistants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ac5c6f-f405-4e0a-a04f-a9afab660136/vibisu.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/pomab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/775fcb30-87cf-4259-af6f-160e4841d76a/30424442415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f061a032-ec49-47ad-b94e-4b7672e15094/tabla_periodica_de_elementos_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ef96895-d359-422c-b2c2-59c9d19d34c0/digital_electronics_book_in_hindi.pdfIn PDF document text
    • http://pevurabune.rf.gd/uv_visible_absorption_spectroscopy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a572456a-2f95-4c65-abda-6000243eeecf/busewezibefuxiwikilukogup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/765b38af-7a7e-4b59-99ae-d9fd09f3efd2/can_you_print_without_color_cartridge_hp.pdfIn PDF document text
    • http://nidikofuwovi.rf.gd/10865346637.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_off00020666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20666 5100 bytes
SHA-256: 61be4ef67e4c317aa05ab81179428714595a731f368a0f2ce109b20d184f2b6e
font_01_sfnt_off000217da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x217DA 12384 bytes
SHA-256: fb985a7d25a2f534bf7405f0dd4b732944b13d79ea0655f242acb542649dc8be