Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b2367dd927ed53…

MALICIOUS

PDF

68.1 KB Created: 2021-03-12 12:36:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aec302f57f0639b4b18843ec9f125128 SHA-1: 2244983e46763cd5f01304987bbb2e271f506c6e SHA-256: 23b2367dd927ed53555c00ea7728741964488afeacb72e2adebd2c33e1457519
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting a link farm or phishing attempt, with one prominent link pointing to 'https://seumenha.ru/award?keyword=canyons+ski+resort+trail+map+pdf'. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest that the document is designed to redirect users to malicious sites, likely for the purpose of downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=canyons+ski+resort+trail+map+pdf
    • https://gonajomu.weebly.com/uploads/1/3/5/3/135383834/lapodiwulene-fuwunulotu-gofajomos.pdf
    • https://cdn.sqhk.co/jovowosifo/fuggdjg/30588152455.pdf
    • https://xapowukugo.weebly.com/uploads/1/3/4/7/134702937/xedafezenuwumirelepe.pdf
    • http://duvazejezirofid.22web.org/que_significa_liderazgo_autocratico.pdf
    • https://cdn.sqhk.co/nozedimasav/ghCoWvQ/bosajozovavi.pdf
    • https://jomezafivawig.weebly.com/uploads/1/3/1/8/131856232/jokiposojolurem.pdf
    • https://romigugegis.weebly.com/uploads/1/3/1/3/131384185/lipixar_futomisuniji_wamomib.pdf
    • https://static.s123-cdn-static.com/uploads/4464730/normal_5feffa7ce2b05.pdf
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/7498784.pdf
    • http://zepawagir.iblogger.org/44078739522.pdf
    • https://cdn-cms.f-static.net/uploads/4454043/normal_6015190c4f919.pdf
    • https://zudibuliri.weebly.com/uploads/1/3/5/3/135319562/nowasadi.pdf
    • https://cdn.sqhk.co/jifonakilux/aggPbhg/pigozuzugivadebiri.pdf
    • https://jowetetezuvam.weebly.com/uploads/1/3/4/7/134717416/8059144.pdf
    • https://kojezuduw.weebly.com/uploads/1/3/5/3/135326104/4102267.pdf
    • https://sepetumeba.weebly.com/uploads/1/3/4/6/134601334/riguva.pdf
    • https://cdn-cms.f-static.net/uploads/4461780/normal_60314d12e561e.pdf
    • https://xoselupovogim.weebly.com/uploads/1/3/4/6/134610719/zarajupew.pdf
    • https://xulijuba.weebly.com/uploads/1/3/1/1/131164032/895d48357274628.pdf
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/1977983.pdf
    • https://static.s123-cdn-static.com/uploads/4386607/normal_5fcf26f01abc3.pdf
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/supota-mesizakegobev-doxajezenafiki.pdf
    • https://cdn-cms.f-static.net/uploads/4444882/normal_60476a656fb81.pdf
    • https://bagugesi.weebly.com/uploads/1/3/0/7/130775983/2159784.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xetulugesoboko.epizy.com/psd_invitation_templates.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d01b.bin
9c31185dac3fa9416d2ccb9364133ac56adc6ab8e3a36b788355a2a77ba50679		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD01B 5256 bytes
font_01_sfnt_off0000e1f5.bin
022039c2a4ae94c438802cc20f0de5b097c1798c206e5b1805f87c5b60ee8236		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F5 9656 bytes

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