Malicious PDF — malware analysis report

Static analysis result for SHA-256 410e6cab829a998e…

MALICIOUS

PDF

78.2 KB Created: 2021-06-01 06:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ba584857d501fec7afa6fa2351ff7304 SHA-1: c560a9a6fcbe04bbe3dc1f3ba739ddb7431a98a6 SHA-256: 410e6cab829a998ead6decd0f56fb56eccb00f692631ced55ada071880a8b41f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one pointing to a link farm on 'infrive.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being used for phishing or distributing further malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://infrive.ru/pbw?utm_term=best+toolbox+for+minecraft+pe PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495686/normal_5fcb062d99c44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403673/normal_601446c624462.pdfIn PDF document text
    • https://vazitaxigenot.weebly.com/uploads/1/3/4/6/134640409/b3fea76cb6d8789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416501/normal_5feb32ccc5460.pdfIn PDF document text
    • https://ritidajadufe.weebly.com/uploads/1/3/4/6/134622671/wuxopo_bebumelanaw_nivanunit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489241/normal_602116dc647a2.pdfIn PDF document text
    • https://gebifafotuzuwi.weebly.com/uploads/1/3/5/3/135324040/c5d0c72d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_6044d4c5c8daf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426418/normal_5fdbfdf0f192c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446166/normal_5fdbaf61a54b5.pdfIn PDF document text
    • https://sawefewukiwow.weebly.com/uploads/1/3/1/4/131406412/95aa8aa2.pdfIn PDF document text
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/rinunatasigoxeli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_5ffd417adbbeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454558/normal_5ff4b5837bb01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382784/normal_603e4758c5adf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://garifukedako.pbworks.com/f/41002469009.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144427413/41497457766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f9b985-d980-4601-93dc-81633ffad96e/post_office_savings_account_balance_enquiry_number.pdfIn PDF document text
    • http://gufabewa.pbworks.com/f/sukanya_samriddhi_yojana_form_pnb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e520218-53a1-4f62-8846-37c520255836/82669603256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fcf9c3c-b1cf-4112-b66d-379e185a5c4e/kingdom_hearts_dearly_beloved_sheet_music_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b89c31-de87-4423-b27a-b0ca3016f735/zemog.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/f/monosacaridos_disacaridos_y_polisacaridos_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/756a08ff-a06c-4294-85a8-be4fc21f06dc/craftsman_lt_1500_replacement_engine.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/w/file/fetch/144442734/lodotibutavokanak.pdfIn PDF document text
    • http://nefusim.pbworks.com/f/how_to_get_a_pre_approval_letter_for_a_house.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144425715/dolarofawimemazojavujodub.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/f/cebolla_informacion_nutricional.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/shaun_king_net_worth_nfl.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE971 5208 bytes
SHA-256: 193d7aaffa96e661376c0864ff13f1fec2abad52e14b18e646b2893ba8d824f4
font_01_sfnt_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 9976 bytes
SHA-256: 3866b09e84bc54eb0295c3eac7600d0357f47cb405aad5d990c98b4ffec67aee
font_02_sfnt_off00011cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f