Malicious PDF — malware analysis report

Static analysis result for SHA-256 84590a3b8e87efd9…

MALICIOUS

PDF

71.4 KB Created: 2021-03-04 09:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 68346c0df15385a429f1e9de111a18d0 SHA-1: 49c40a1a3255f7b8d042d1e434ffc39aa154b25d SHA-256: 84590a3b8e87efd9babbb0af29444f35fcbc11f0d32e7a0f35c16e9aed35a548
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically appearing as a search result for a product. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a malicious intent to distribute phishing or malware. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/award?keyword=kenmore+elite+dryer+model+796+heating+element+replacement PDF link annotation
    • http://bejuzoz.iblogger.org/night_sky_with_exit_wounds_vk.pdfIn PDF document text
    • http://bavewemelemare.iblogger.org/the_new_tribe_buchi_emecheta.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/4460718586.pdfIn PDF document text
    • http://waranijovuv.sportsontheweb.net/65580081789.pdfIn PDF document text
    • http://itdiscount.info/cutting_edge_upper_intermediate_teacher_s_book_free_downloady1i7m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466411/normal_5fcdaa15c239f.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/gefokevit.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/what_is_a_swift_number_for_wire_transfers.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/humanist_manifesto_2000.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/26714534398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_5fdb2dac9efe7.pdfIn PDF document text
    • http://hyipinvest.site/517332503580hyqm.pdfIn PDF document text
    • http://jurelireroxux.22web.org/9451291700.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://deketinak.rf.gd/boori_bassinet_sheet_size.pdfIn PDF document text
    • http://junipom.rf.gd/57191209843.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_off0000d912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD912 5768 bytes
SHA-256: b4ea2639becb314dd40d24c36b9bb3021935371873221e929369ab714afaff4a
font_01_sfnt_off0000ec9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9F 10588 bytes
SHA-256: 593043595e9f25f442f1d6c0388039c81090c88c70d9fe291e98687d0fdf7926

Open this report in the interactive analyzer, or submit your own file for analysis.