Malicious PDF — malware analysis report

Static analysis result for SHA-256 6235a55c574f4f69…

MALICIOUS

PDF

76.5 KB Created: 2021-03-23 09:24:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d22418c84d58bfaba2844f200f3290df SHA-1: 254560241759269d136c43ae5dd6724776e8e382 SHA-256: 6235a55c574f4f69a0db9dcc96c468edd42bcf54a687c1b801274a34504c2e93
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains and link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/award?keyword=la+arqueologia+del+saber+descargar+pdf PDF link annotation
    • http://vevaroda.scienceontheweb.net/48523906469.pdfIn PDF document text
    • http://bazis-rostov.com/37842858522tll0e.pdfIn PDF document text
    • https://cdn.sqhk.co/wupetutigo/LvY1ihz/13241589869.pdfIn PDF document text
    • https://cdn.sqhk.co/mojazejo/jdhPjiZ/61269666352.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/bebativ.pdfIn PDF document text
    • https://cdn.sqhk.co/goxepijikun/1zmvgga/star_picket_fence_extension.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384468/normal_5fc78d7dd45ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483072/normal_6017513c98b72.pdfIn PDF document text
    • http://moxupasasitote.mywebcommunity.org/ars_amatoria_italiano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485807/normal_603e35c664622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_601a62d97b36a.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/ihcighc/sedovemu.pdfIn PDF document text
    • https://cdn.sqhk.co/nomuzali/0ifgf8b/zotimoxed.pdfIn PDF document text
    • http://voirlo.xyz/81274333875gun75.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/blackdecker_uncooked_rice_cooker_3-cup_whitejnpd6.pdfIn PDF document text
    • http://azakalaza5.xyz/define_dress_down_meaningjo9ct.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eadf20c1-9e85-44b2-a699-8318f4f2ff9c/tatefisamuxar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8636f00-b2e9-44e7-80b3-d36b61299fd5/rovakizubalaxowumorape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5de68d03-3b6f-4d3e-82dd-0fce1484e256/what_does_purgatory_look_like.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aafb2fe-72f2-4543-ad49-8d7b5a1eb7a0/kaloxewesezedofepofumusoj.pdfIn PDF document text
    • http://kepawomokatuke.myartsonline.com/autodesk_eagle_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/183ca1dd-1dfc-4045-857a-42d0c7be716d/aasimar_what_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4793634b-ec79-4e84-98e6-b4f79484d87c/wujifixunajinatetebelej.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_off0000e66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66B 5528 bytes
SHA-256: 4755a6b4381fc8182e58675144df51f62b40359e472aacdb7e01775062e2534c
font_01_sfnt_off0000f939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF939 13068 bytes
SHA-256: a9eadfa1830849d87178478f8565807427bd7db383aabfe124a3a11bd3fe38ae

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