Malicious PDF — malware analysis report

Static analysis result for SHA-256 163be53e8332e847…

MALICIOUS

PDF

88.5 KB Created: 2021-03-25 05:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dca77b690e574515452e1a1bd976502f SHA-1: 91b3fb479bb416f84654b73b93b505354a2a02c5 SHA-256: 163be53e8332e84798479ed0a7380249d4e380dc6db388e0f7763036df7b2331
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 0.9996

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://dugedepap.ru/123?utm_term=isley+brothers+songs+caravan+of+love PDF link annotation
    • http://wetepuzasuvuroz.22web.org/73969762976.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/5gfwGyL/zombie_island_massacre_review.pdfIn PDF document text
    • http://pexulabin.iblogger.org/nuberupam.pdfIn PDF document text
    • http://dupipavigojas.iblogger.org/ielts_writing_answer_sheet_task_1_academic.pdfIn PDF document text
    • https://cdn.sqhk.co/wupetutigo/i2geidB/kofolanub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_b12e81f3fae241c8a79a736353d827dc.pdf?index=trueIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_b148b4e61f144c929d9f5183e5d7d68f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vukujidor/77873792245.pdfIn PDF document text
    • http://panobamufa.epizy.com/examples_of_system_software_and_application_software.pdfIn PDF document text
    • http://vavoxixe.epizy.com/guide_rputation_confrrie_du_thorium.pdfIn PDF document text
    • http://xepujolomeja.epizy.com/where_to_drop_off_old_clothes_canberra.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/gowolijusazuvidorux.pdfIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_ca998caab3a6407aa6beb1ae8e453e3c.pdf?index=trueIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_fd6d2adf1cb143d28968b68c2dad8f1e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/1682736971.pdfIn PDF document text
    • http://sabozovitebem.rf.gd/fekegiratifununepiwefir.pdfIn PDF document text
    • https://f5ab370f-1445-465c-ae0a-adb246d340ff.filesusr.com/ugd/2d95ce_2deca0d3cee447348bff10b2e05910f8.pdf?index=trueIn PDF document text
    • http://fuvitagenago.rf.gd/fobupaxusukujipob.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/6679939684.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/pdf_file_reader_pypdf2.pdfIn PDF document text
    • https://6997f972-013f-4c6f-ac95-4179ba17a557.filesusr.com/ugd/549e1a_e2df48d3acdf4a18a593e865669359d4.pdf?index=trueIn PDF document text
    • http://gavenivifi.rf.gd/halloween_pumpkin_template_printable.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFA 5380 bytes
SHA-256: 2edc7404f3ebf877a43ec37ee13e21cc01cec302a84b39869cb85896273e427b
font_01_sfnt_off00012e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E57 11228 bytes
SHA-256: d7b609ad9efc8f4c57abdeeeff5586f3b105ed91e0d95a944adc7c125e8cdb87

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