Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0512235ba32715…

MALICIOUS

PDF

97.3 KB Created: 2021-03-13 15:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 09b6114ff993e25f0bc2ef539d4ce1e0 SHA-1: daa85435fe81d86df20b4f8a327df2a1d869b424 SHA-256: ed0512235ba32715439ff81f8400f94f8bb43a383712752a688c37307992702d
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wb?keyword=d-link%20dsl-2750b%20manual PDF link annotation
    • http://piredvizhnik.com/nordictrack_a2350_troubleshootingzgbo3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420924/normal_604808766fe32.pdfIn PDF document text
    • http://procripton.com/doguz7mscy.pdfIn PDF document text
    • http://tryse.xyz/9054167105vtvu9.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/fk1M369/stickman_master_archer_legends_cheat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_6047ac0785aa2.pdfIn PDF document text
    • https://cdn.sqhk.co/tulazofava/edhfOTG/zelipasukosagu.pdfIn PDF document text
    • http://center-san.ru/761403985414opby.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/68296990177.pdfIn PDF document text
    • http://fasadi.site/fejufotezazodefifufegevgxh2.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/givonuzu.pdfIn PDF document text
    • http://yachts-4-sale.com/decal_application_instructions_svgygvcx.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/82200562973.pdfIn PDF document text
    • http://custits.space/firaleza7wa.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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
    • https://uploads.strikinglycdn.com/files/d55265d7-9b3c-4e5c-b3d8-641b321989fd/how_to_calculate_for_percentile_rank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5562865-f46e-41bb-9824-59221ff5b886/zalumufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9afb39-4ecb-4352-8655-7fd02c38ffaa/womijasovobugeworusul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c5b5494-05c0-4cef-9241-12014f9861df/how_much_are_speed_queen_top_load_washers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12999 1768 bytes
SHA-256: 4d48c425ebef90c2d02d06bcf645bfe766804625a466b4613fba07e24684c3c9
font_01_sfnt_off00013240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13240 5164 bytes
SHA-256: d2ebfbb5d2b7ebe6a99b4bb089a3be75a5b02359be2c34af79507dad018c9b24
font_02_sfnt_off000143ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143AD 11212 bytes
SHA-256: 5c9c63c436929aef0be8ecdb7d2dbc343980670d0f62e78d427eb4d37de28b64
font_03_sfnt_off000169cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169CF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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