Malicious PDF — malware analysis report

Static analysis result for SHA-256 58fe5bc59cbde52a…

MALICIOUS

PDF

76.4 KB Created: 2021-03-11 18:15:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b10eabf0fc1faada48ccba924b52989a SHA-1: 90915a10730614249788cd480ab727775b28f628 SHA-256: 58fe5bc59cbde52a44444fdd271d96203764f060a6f292916e913229819219db
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML detection strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=continental+divide+heidegger+cassirer+davos+pdf
    • http://svarka-aurora.online/remember_me_from_coco_sheet_musicyzn5r.pdf
    • https://cdn-cms.f-static.net/uploads/4410448/normal_5fd99487c8d1a.pdf
    • http://zowefokixot.iblogger.org/92320766999.pdf
    • https://static.s123-cdn-static.com/uploads/4389823/normal_5fdd8283241b4.pdf
    • http://tiktokhd.design/dapuloxozafizetowodmj.pdf
    • http://ejinaya.com/61676474252ny4aq.pdf
    • http://gutprod.xyz/54016290051vbyk.pdf
    • http://zebolalifitu.22web.org/41843498796.pdf
    • https://cdn-cms.f-static.net/uploads/4388407/normal_601562954da78.pdf
    • http://detonic-romania.website/mukelojidu12l70.pdf
    • https://cdn-cms.f-static.net/uploads/4474471/normal_600d996be03d5.pdf
    • http://card2card.live/how_to_train_your_dragon_book_12_audiobooksf4ms.pdf
    • http://dugules.iblogger.org/65266905811.pdf
    • http://academic-club.ru/vatiperexopegikonibapijl6e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zinizebaki.epizy.com/calculus_3_book.pdf
    • http://guvamimifufirar.rf.gd/lisukaxidaziloxut.pdf
    • http://woxanegerofokox.rf.gd/natowepulujinibunipijer.pdf
    • http://famirafopuremu.rf.gd/concur_create_expense_report_from_trip.pdf
    • http://vexukaxazixaxet.epizy.com/76077199974.pdf
    • http://sozofini.epizy.com/59393689276.pdf
    • http://mugosovexu.epizy.com/addiction_severity_index_5th_edition.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_off0000eb59.bin
fbf7323dff7f828d0d0021ff34c78716f27b31233d7fc1ded184180443882384		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB59 5384 bytes
font_01_sfnt_off0000fdaa.bin
674cc3d15aedb40a93d8b66d91f14663b9b557d215d84484ec951e77f22b2c76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAA 11428 bytes

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