Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed59030cf054218d…

MALICIOUS

PDF

115.4 KB Created: 2021-05-19 09:34:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3355d27cd6cf79977991384c7b8d2323 SHA-1: ee701b3369df93e6242f1084935d0158e9cd4ea2 SHA-256: ed59030cf054218da01e18e957b414175067a501ed2169c66f59ffd12719505e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs points to the document's primary function of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/strik?utm_term=thomson+reuters+journal+list+2014+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456121/normal_5fcdb5ea5a585.pdfIn PDF document text
    • https://lorajezaked.weebly.com/uploads/1/3/4/3/134367433/3379641.pdfIn PDF document text
    • http://somukegizos.66ghz.com/descriptive_predictive_prescriptive_analytics.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/wudetelef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462065/normal_5fc9f60d23eaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483365/normal_5ff7822b3c7d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467560/normal_602f4d01b88b6.pdfIn PDF document text
    • https://biwewonopegad.weebly.com/uploads/1/3/1/3/131380063/e96de202b6.pdfIn PDF document text
    • https://gogodelile.weebly.com/uploads/1/3/0/9/130969080/pufoziditukapimones.pdfIn PDF document text
    • https://nebobaxewakizix.weebly.com/uploads/1/3/1/6/131637309/nekalog.pdfIn PDF document text
    • https://gifoxulexup.weebly.com/uploads/1/3/4/8/134865115/kisomasemekijuse.pdfIn 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
    • http://tokewaperomuveb.epizy.com/87262972697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda14329-7ed6-4ac4-a497-50f13d1e5787/malurobajixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a067a020-66a6-4cff-80c7-ba3acc08012f/26527381512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e5a067-17ca-4d9e-a441-e7f9caf8b8d0/que_tipo_de_interfaces_hay_para_un_sistema_operativo.pdfIn PDF document text
    • http://lixaxezubor.rf.gd/29351218210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af2693e4-68ae-4cf7-b2ea-03597b614789/54380990444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff4ca2ed-8911-42d6-b5da-204aa8299d47/wisanesunaka.pdfIn PDF document text
    • http://puloxivomavari.epizy.com/54389801313.pdfIn PDF document text
    • http://xesijapapun.rf.gd/30595858138.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000173bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173BD 5600 bytes
SHA-256: 578e7cdd00e2521c66bf5e87b1d510c34e461e911ee0ece5e752d31faf76f742
font_01_sfnt_off000186a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186A5 13208 bytes
SHA-256: e94b7c5a4b9fdb991c4827379015d6bf1b0b7e43ab2a3965fcebcc0f26bf9dc4
font_02_sfnt_off0001b14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B14B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361