Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49c73b6ab040c3b…

MALICIOUS

PDF

71.2 KB Created: 2021-04-22 22:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fceeb687066d79e1c0ea186e0050337 SHA-1: 92649085591e1b9850bcbc99ce1606ab12217fd4 SHA-256: d49c73b6ab040c3be185ef5e400016b19bd703868e50bd7364df118606470c78
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. One of the primary external URIs, 'https://lozipotod.ru/strik?utm_term=what+are+the+11+paid+holidays+2020', is likely used to direct users to a malicious site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=what+are+the+11+paid+holidays+2020
    • https://cdn.sqhk.co/vujalenan/bhfwnhe/fezuk.pdf
    • https://cdn.sqhk.co/defisepeniba/idnc6eW/fox_tv_guide_utah.pdf
    • https://cdn.sqhk.co/mepapogivoma/fgfhcbJ/kafadanuxozekanizusode.pdf
    • https://cdn.sqhk.co/mugolino/aZjBif6/99600012284.pdf
    • https://cdn.sqhk.co/kifavubivelo/6gchijV/jafosowupuk.pdf
    • https://cdn.sqhk.co/muwitajo/ijF3VRM/katasiniroxusakimetez.pdf
    • https://cdn.sqhk.co/gilubibawi/lqibpn4/blockchain_technology_in_healthcare.pdf
    • https://cdn.sqhk.co/ligumorik/jgCmOjb/74521709375.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wofaxil/difinirubixoj.pdf
    • https://s3.amazonaws.com/rupatojuko/ginenapesuro.pdf
    • https://s3.amazonaws.com/zunaduxa/apneas_centrales_en_nios.pdf
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_a887905cd9b1425e82bd68ff64c64142.pdf?index=true
    • https://uploads.strikinglycdn.com/files/878223ff-c586-463e-8b41-664716ebc650/how_istikhara_is_done.pdf
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_9a16349eb4584eb58f9bc6d4ee248b8e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c0ec1f20-07e7-46f2-8c25-74dd889c5ad7/59957686977.pdf
    • https://b2bd4247-5771-4f9a-9f3f-b46500bff287.filesusr.com/ugd/f41bfe_78c8131fd5494516a14275127b40ff50.pdf?index=true
    • https://s3.amazonaws.com/memobofilenabon/65162231904.pdf
    • https://uploads.strikinglycdn.com/files/49bc0c8d-2cbd-4b41-9ee8-302b7a584831/50832122253.pdf
    • https://uploads.strikinglycdn.com/files/b64dbbf7-0b5c-49be-95a6-8977f24c0d6d/64339612095.pdf
    • https://s3.amazonaws.com/tuxutedi/kinopodarokugoxitam.pdf
    • https://s3.amazonaws.com/jobavo/fezebutufif.pdf
    • https://s3.amazonaws.com/benubapopikaj/essentials_of_entrepreneurship_and_small_business_management_whats_new_in_management_9th_edition.pdf
    • https://uploads.strikinglycdn.com/files/514b6c2e-40a6-419b-a1ab-cb54ad4fd39b/53533003935.pdf
    • https://s3.amazonaws.com/xupizewuxere/tamasha_full_film_hd.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8e6.bin
7104985474e4ffaa6f8900f559c4b00e5ad6e5f9a9105c3838eff49115ff09a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E6 5488 bytes
font_01_sfnt_off0000eba5.bin
2f900107468dda0c5a481384e214b59f897c5f5c9caa698e8bb87a68d37249a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA5 10616 bytes