Malicious PDF — malware analysis report

Static analysis result for SHA-256 c276a4f6a93052e7…

MALICIOUS

PDF

71.3 KB Created: 2021-03-30 11:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8cc62d641594ae3cd5372e3d83447271 SHA-1: 673752de83fd250810a702b324e01bc478236710 SHA-256: c276a4f6a93052e72700cc423d023b45640ecfe1fe7ff005214f3d6dac6c0eb3
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm. The primary URL, https://vilenefex.ru/wix?keyword=word+splash+template, suggests a lure related to 'word splash template'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or SEO abuse. No scripts were extracted, but the structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://vilenefex.ru/wix?keyword=word+splash+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451356/normal_5fd1ed359b417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_6013bf2b3380f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_602afd41eb6d0.pdfIn PDF document text
    • https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/kenenib_nererede_nivavanulog.pdfIn PDF document text
    • https://bifukedupojuxi.weebly.com/uploads/1/3/4/4/134498794/geruvij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418191/normal_5fe912b2d048d.pdfIn PDF document text
    • https://xuremesedadewo.weebly.com/uploads/1/3/4/5/134500919/6253175.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://papawipowujujed.rf.gd/ginomodovu.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/51253313855.pdfIn PDF document text
    • http://monebepebozetos.epizy.com/97316039481.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/loveland_ski_weather_report.pdfIn PDF document text
    • http://dubabin.rf.gd/ledutibebesal.pdfIn PDF document text
    • https://9cc03a5b-da86-4a44-8f3d-15f7580f9586.filesusr.com/ugd/cac91c_6d285d4c11a4435fa8ffd008b76092e4.pdf?index=trueIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_c12a7768388e45e1a11da6e4eb8514e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/no_cable_tv_guide_springfield_mo.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/dateline_on_own_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/xanathars_guide_to_everything_prodigy_feat.pdfIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_b25bf9284503471d84693595d45fc0de.pdf?index=trueIn PDF document text
    • http://sarudinok.epizy.com/keratibopigibonefovejo.pdfIn PDF document text
    • https://ff8eac81-0dee-4da4-b7c1-1dee070544a7.filesusr.com/ugd/2637cf_b35dbf71430b46d4885adc95c6fe5929.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figidireki/xoseluv.pdfIn PDF document text
    • http://mipobigagove.rf.gd/boxexaxinaxoxogeraxubigo.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_off0000dc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC31 5212 bytes
SHA-256: 8239c3b2679aafc11281f4f557bf9a207b34dc16a81c156988b3f9376e439a28
font_01_sfnt_off0000edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 9912 bytes
SHA-256: a64b4910c663edb1cc5d3afc8411682617f49e79a3ebc8990d985faf55375bc2

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