Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d8d6e65bbd85a3…

MALICIOUS

PDF

76.6 KB Created: 2021-03-07 13:26:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4fff743106923d2ffc0ab1ab61c57c8e SHA-1: aca64d12e14a3129b428b062da3e37454d7448f1 SHA-256: 08d8d6e65bbd85a31c766d84bb3ea7e0f60f8b00435ff4433fd1f4ae678f7a62
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary external URI pointing to 'https://leonvi.ru/strik?utm_term=how+to+cook+a+ribeye+roast+in+a+pressure+cooker'. The document body, though heavily obfuscated, appears to contain text related to cooking, likely serving as a lure to disguise the malicious intent of directing users to external sites.

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 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/strik?utm_term=how+to+cook+a+ribeye+roast+in+a+pressure+cooker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393485/normal_603e1ad0f06ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404113/normal_5ffa7ae0d93fc.pdfIn PDF document text
    • http://kefowawud.22web.org/vipulevezakuluxowifusaza.pdfIn PDF document text
    • https://xuxixoxeniti.weebly.com/uploads/1/3/4/5/134585484/tuxeme_murakafulex_xojizev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496225/normal_6014fac4e6fa4.pdfIn PDF document text
    • https://befukifesili.weebly.com/uploads/1/3/1/4/131453358/zifokuwikawagulofar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_602b75eac7ed3.pdfIn PDF document text
    • https://moluzepin.weebly.com/uploads/1/3/1/8/131856103/5509ef635e8f4.pdfIn PDF document text
    • http://pepujolajerikur.66ghz.com/29760074587.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421944/normal_5ff085abf12de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gukewaxubi.epizy.com/wofomeko.pdfIn PDF document text
    • http://bajipodi.epizy.com/53837302316.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/2832649708.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/vepapovulegogeriv.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/44923142458.pdfIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_65c2eab3013349279457e04225b173a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebenok/background_remover_software_free.pdfIn PDF document text
    • http://rapaxaj.rf.gd/video_er_for_facebook_free.pdfIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_89a3f51a33d24255b59333013fcee808.pdf?index=trueIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_b23b98f133bd40c385ab8c0b1e972e63.pdf?index=trueIn PDF document text
    • http://xojesenokok.epizy.com/2505247021.pdfIn PDF document text
    • http://vabagez.rf.gd/42098799168.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_off0000ee05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE05 5252 bytes
SHA-256: 1b1fc2dd2e633fbb5c676749728a37e406222bd74f09347cb516bbbcef368eaa
font_01_sfnt_off00010009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10009 10736 bytes
SHA-256: 5cbdf784a061a92833a64c680171e8e8432f3152ef45b920e47c84d3bf959758

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