Malicious PDF — malware analysis report

Static analysis result for SHA-256 00bfeba84520bb66…

MALICIOUS

PDF

91.3 KB Created: 2021-04-29 17:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f1242dc329ba9a90c31fe7b6a89a82c5 SHA-1: 9d6e1b538560a2a1ec54c632c2a472ca1e6a1415 SHA-256: 00bfeba84520bb66ece7e29e65a4db88ddd6a8098512c6e494ae8f54a82e000e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/strik?utm_term=cara+reset+headset+bluetooth+lg+hbs+730 PDF link annotation
    • http://shtangelkipokupkiitd.online/gaxumagiwovawryswp.pdfIn PDF document text
    • https://cdn.sqhk.co/waxoxewanuvi/ctWPxCl/22523081622.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/hc5whgK/11135655532.pdfIn PDF document text
    • https://jidupedepinamup.weebly.com/uploads/1/3/2/6/132680921/f6b1cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_602873eb3e974.pdfIn PDF document text
    • http://ampinternational.org/nivejupagederufokosenaxe5a3se.pdfIn PDF document text
    • https://mirexoxufi.weebly.com/uploads/1/3/0/9/130969656/de991.pdfIn PDF document text
    • https://cdn.sqhk.co/jekenilegefe/8dhbt8w/eggy_numbers_to_100.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/hqqbWpJ/bare_knuckle_fighting_championship_stream.pdfIn PDF document text
    • http://copyright-notice-ig.com/sofiwijotovsex4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389387/normal_5fcef70670a53.pdfIn PDF document text
    • http://fastcreditreport.info/60338477045emmml.pdfIn PDF document text
    • https://liluwovadig.weebly.com/uploads/1/3/3/9/133999138/ff8e897d23a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_6067f733e862b.pdfIn PDF document text
    • https://molilavavabofu.weebly.com/uploads/1/3/5/9/135989114/671a2374d2d755.pdfIn PDF document text
    • https://giwonogudere.weebly.com/uploads/1/3/4/8/134872327/dc7b89aa5cb5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_81b59861b2f143908f90ef07158402fb.pdf?index=trueIn PDF document text
    • https://f9a132f0-acc9-4761-b7d8-38025aedd849.filesusr.com/ugd/5c71d6_784dab8bc33440038141daee21a81422.pdf?index=trueIn PDF document text
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_6507ad691e89439393b9fc86649ff6fc.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_49390e6c66174450b47b666c96998310.pdf?index=trueIn PDF document text
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_44cb10324ef44cbc9ddcdd3f599e5349.pdf?index=trueIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_af6bf56aaa1a4ef09437f59418137cae.pdf?index=trueIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_b2641cc2acf84c089b8e87ff778b46ce.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001264e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264E 5520 bytes
SHA-256: 298ccdc9a063f07fe0146d7efed0d83ae1f9da0369c77051ed05ae8639b37069
font_01_sfnt_off00013908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13908 10824 bytes
SHA-256: f37f28aa62becc679ffec2cb409b232473fde661b0cc8196aa7db055d9a9aca9