Malicious PDF — malware analysis report

Static analysis result for SHA-256 326c5d9c179d2685…

MALICIOUS

PDF

85.5 KB Created: 2021-02-20 18:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 81294e17598be067a08864e4e9d245f8 SHA-1: 9d92115343e9b848de75453a0e061c5883607c45 SHA-256: 326c5d9c179d268598ab031531159b8eaeb1da66a0561effe989d65c045d68bf
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The sample is a PDF document flagged by multiple heuristics as malicious, including a critical finding for redirecting to known malicious infrastructure. The embedded links and the document's structure suggest an attempt to trick users into visiting these sites, likely for phishing or to download further malicious content. The ML classifier also strongly indicated maliciousness.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=the+silver+way+art+book In PDF document text
    • http://genemot.22web.org/volume_of_rectangular_prism_practice_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425492/normal_5fe434195e3e6.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/XhaogeR/65622488447.pdfIn PDF document text
    • http://sazaleve.22web.org/zovenobe.pdfIn PDF document text
    • http://kpovli.ru/picture_editor_app_macs6ie9.pdfIn PDF document text
    • https://genebametujo.weebly.com/uploads/1/3/4/9/134904617/derafuwiwug_rowapodanujo.pdfIn PDF document text
    • https://livubefelamujir.weebly.com/uploads/1/3/4/8/134899239/towovarefo_zitotu.pdfIn PDF document text
    • https://dodanopo.weebly.com/uploads/1/3/1/4/131408738/9346925.pdfIn PDF document text
    • http://itabody.space/jubekuluximifinuvegezopkxn4r.pdfIn PDF document text
    • https://cdn.sqhk.co/bozogekeji/jgjhiqY/lesifowusefowupotigetapu.pdfIn PDF document text
    • http://4gusevshop.website/how_to_cook_rice_in_philips_multi_cooker9d1ii.pdfIn PDF document text
    • http://card2card.live/certificato_di_residenza_autocertificazionecadvw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laganomezavarof.epizy.com/78358942866.pdfIn PDF document text
    • http://padekapekalerel.rf.gd/58130088373.pdfIn PDF document text
    • http://lexonazez.rf.gd/68407401273.pdfIn PDF document text
    • http://soxaxefuwuto.epizy.com/descargar_traductor_de_google_ingles_espaol_gratis_para_pc.pdfIn PDF document text
    • http://retetopipazaned.epizy.com/71396299294.pdfIn PDF document text
    • http://webubop.rf.gd/lodigudevuk.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_off00011051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11051 5180 bytes
SHA-256: 44422d2337e1ff1ac5714f3b2a828c519ec981d1639069afbeb5df18cb89b22e
font_01_sfnt_off00012204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12204 11464 bytes
SHA-256: b47106eb2772106b5ed09d8297c6d858210646d84e658e5e57f1ba2e8d6051e4

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