Malicious PDF — malware analysis report

Static analysis result for SHA-256 d145ebb8ab2ddd6f…

MALICIOUS

PDF

78.3 KB Created: 2021-04-21 14:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: daf3a575c809ead79c1f4164404e2e20 SHA-1: 05bbfdb45d3b651d59a8be72827a2d390c7d588f SHA-256: d145ebb8ab2ddd6fa0d0867ec333dae644fc526a759ba0e439378805321ae28a
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting, and is flagged by ML and ClamAV as malicious phishing content. The embedded URLs suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent.

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://bologen.ru/strik?utm_term=waring+pro+deep+fryer+df200 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421612/normal_6010ae2d3bcfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472774/normal_5ffe6383b0bf0.pdfIn PDF document text
    • http://lixuzixewufixib.66ghz.com/sododexam.pdfIn PDF document text
    • http://wonamesavap.iblogger.org/46262446215.pdfIn PDF document text
    • http://amorexpo.com/51671858567w0nz.pdfIn PDF document text
    • http://jiwujut.iblogger.org/cox_contour_guide_options.pdfIn PDF document text
    • http://xevuwelepudexo.iblogger.org/business_model_innovation_at_wildfang.pdfIn PDF document text
    • https://cdn.sqhk.co/sitosuduf/1xGajfz/eat_it_all_gif.pdfIn PDF document text
    • http://dkblogin-de.com/35241925418aor5g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422386/normal_5fcd605ed1fcf.pdfIn PDF document text
    • http://makamar.xyz/dajimuzazapirazozigenani5ioiq.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/cjf7geR/vodeloloxusidetekej.pdfIn PDF document text
    • http://texewofe.22web.org/farmall_h_tractor_parts_for_sale.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://jinimivunom.epizy.com/comparative_anatomy_of_brain.pdfIn PDF document text
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_2524a67353da4ffbbbfa34b3d4bb0e3f.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_81660d90526c4f5fb6be4100655bdaa9.pdf?index=trueIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_f837e09b619f48329114d00c884f6f90.pdf?index=trueIn 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_off0000e88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88F 5096 bytes
SHA-256: 4bb5bc06486e85de565e2417e3629c107586ecc8abbe071c023563c920848a2c
font_01_sfnt_off0000f9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F8 10592 bytes
SHA-256: e375547de58d871b0d4aa68a0b091917579a20366f5f49810eb8801dd6c5a25b
font_02_sfnt_off00011e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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