Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b67092cd146b617…

MALICIOUS

PDF

75.0 KB Created: 2021-03-16 06:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 068c8c21ff2e5100e87d4f1ede69bfac SHA-1: 196f3e40defa9f6b5584d1003c8ced90a78f30f8 SHA-256: 5b67092cd146b61747e2d8ca14b5794b78dd902b090f74c755980421ee7d034f
126 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to manipulate search engine results or redirect users to malicious content. The primary URL, 'https://botokaw.ru/strik?utm_term=do+pua+get+the+extra+%2524600', suggests a lure related to financial gain. While no scripts were explicitly extracted, the PDF structure and extensive link farm heuristics strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://botokaw.ru/strik?utm_term=do+pua+get+the+extra+%2524600 PDF link annotation
    • http://kamini33.ru/advertising_agency_corporate_profile1c8eo.pdfIn PDF document text
    • http://tapopapebesawu.getenjoyment.net/zabilabuwag.pdfIn PDF document text
    • http://1ux.site/how_to_stop_bosch_washing_machine_mid_cyclen7vej.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/71526888790mhrqi.pdfIn PDF document text
    • https://garujidizog.weebly.com/uploads/1/3/1/3/131398488/zedazizelo.pdfIn PDF document text
    • http://tonevagewalilu.medianewsonline.com/25558706965.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/54612950827.pdfIn PDF document text
    • http://ketousa.site/rodibofem4ntn.pdfIn PDF document text
    • https://fugogifozu.weebly.com/uploads/1/3/4/8/134888696/lepedob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://82cb18f6-4a40-4824-ac11-10070f72ce02.filesusr.com/ugd/5aec95_1d9aaff447a14ba2ae61366d8642a306.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovilowab/17020041998.pdfIn PDF document text
    • http://jifisuxevizek.myartsonline.com/how_to_learn_french_words.pdfIn PDF document text
    • https://1f8834b3-47ac-4b28-85e6-f0b449c9ddf7.filesusr.com/ugd/4cd51e_60f3cf28f0ce4df2ae7148b1a4ad2352.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/administracion_de_medicamentos_via_rectal_diapositivas.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_9cf31ef27bf648e98d7a1939093353b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/zepadog.pdfIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_d4f3719e42c243ae9599eaa0bad8fffd.pdf?index=trueIn PDF document text
    • https://f27bca7f-571c-471d-9e77-92385e6dfcd0.filesusr.com/ugd/9a0fa1_10e142241be6487383e7f4913f93bbfa.pdf?index=trueIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_528438ae1818440295d2b0fc719536f1.pdf?index=trueIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_1e7561925e8e48b781ef840a8609ef49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/resisuna/free_cash_flow_excel_sheet.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_off0000e80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80C 5472 bytes
SHA-256: eccb8ae81f6e6a88b03500397c8a7af88e3395c3f6ea9467589e82b8ab7e1f87
font_01_sfnt_off0000fab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB2 10652 bytes
SHA-256: 9b6c9e16a5dddd07f5f42dbc62a0cfd507595d611270cf6b0860bc9c9c649f0f