Malicious PDF — malware analysis report

Static analysis result for SHA-256 7538e9eb0da381ac…

MALICIOUS

PDF

72.1 KB Created: 2021-04-01 16:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c851511478639dd960ed66f99b9ea299 SHA-1: ef09658c6a5c97329b285dc1f58e4b28506d2721 SHA-256: 7538e9eb0da381ace6c37a333717957c70b04b10a85198c03d8014ce1ac0d189
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document appears to be a link farm designed to drive traffic to potentially harmful sites, masquerading as relevant search results for terms like 'bluetooth driver'.

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
  • 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=bluetooth+driver+dell+xps+l502x In PDF document text
    • http://nanebaxexob.getenjoyment.net/how_to_set_up_a_wagner_paint_sprayer.pdfIn PDF document text
    • http://puviwaxeraw.22web.org/zewakavojaradugogis.pdfIn PDF document text
    • http://zokiwedilar.mypressonline.com/98170608837.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/was_because_or_is_because.pdfIn PDF document text
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/8b486390b4e0e0d.pdfIn PDF document text
    • https://zowozenuzaf.weebly.com/uploads/1/3/1/8/131857278/7aa71e6e7.pdfIn PDF document text
    • https://gaxipisida.weebly.com/uploads/1/3/4/2/134267022/maxozabopefogojefifu.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/tololubasupawidoka.pdfIn PDF document text
    • http://towonededuv.medianewsonline.com/88607236353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402507/normal_6064682a83d3f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/excel_label_template_avery_5267.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/pulur.pdfIn PDF document text
    • http://metepukiwameme.epizy.com/38206362048.pdfIn PDF document text
    • http://tikobonojaxax.epizy.com/14014649681.pdfIn PDF document text
    • http://jigafovuwaxod.epizy.com/37739219143.pdfIn PDF document text
    • http://votojoraxu.rf.gd/rovazezikotiludaraveke.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_off0000dad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD8 5412 bytes
SHA-256: 0145ff292a246902c211eb4a0ea0ac9977de68bb55a32b08b81f95a66f01468a
font_01_sfnt_off0000ed51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED51 11408 bytes
SHA-256: 14b8828c9a012cca90453fabf2486a573cec627eace96636885fbd6b6a38af3f

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