Malicious PDF — malware analysis report

Static analysis result for SHA-256 384df290dfe6a7e0…

MALICIOUS

PDF

77.7 KB Created: 2021-03-24 18:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5809d34feaff69668366262d9d29ea57 SHA-1: db88c311826bbfe8a511b0e091ef0cbb9c590830 SHA-256: 384df290dfe6a7e071d5dea1740aad90acdeaa91bfe3da50780ec3ec324c1076
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://zajinet.ru/strik?utm_term=the+lying+game+book+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477637/normal_5ff66460d40ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_5fe6ef12293b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487431/normal_5fff156c7d0ca.pdfIn PDF document text
    • https://geliwesirodired.weebly.com/uploads/1/3/1/3/131382982/66dd26b.pdfIn PDF document text
    • https://ziralupaw.weebly.com/uploads/1/3/1/3/131379221/lepodepij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455681/normal_5fefb102f16c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383918/normal_5febd5325eabb.pdfIn PDF document text
    • https://gipenozup.weebly.com/uploads/1/3/1/0/131070487/pejiguwotemupu-karunalij-fexazami-rulaw.pdfIn PDF document text
    • https://tijesefufejeje.weebly.com/uploads/1/3/4/8/134858706/puvujudamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411923/normal_602fe2cb42884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_6051310ae12e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369311/normal_5fcb2e4722527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501993/normal_60208a9a19c2b.pdfIn PDF document text
    • https://gumijaxedug.weebly.com/uploads/1/3/4/5/134529094/2209919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415334/normal_604b569c22021.pdfIn PDF document text
    • https://bixaguvukimub.weebly.com/uploads/1/3/1/8/131872105/dazul.pdfIn PDF document text
    • https://ladunibik.weebly.com/uploads/1/3/4/0/134096621/4653378.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/tonefajimilo.pdfIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_e0ff808e82fd44f598aa6e4fd7f1e871.pdf?index=trueIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_2521e0949bdd47c1bf599c76fee54808.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xurixado/alta_performance_curitiba.pdfIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_e4cf011aa9d148e8befcfb2dc97a4ba5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/milegurim.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/gizagulorilasi.pdfIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_1728912150c346d0b567c92e6efdf949.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_off0000f24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 5212 bytes
SHA-256: 7d3c95883771508f9331d6675fb0e9265cbce4a6e501af701d2e5b766919f460
font_01_sfnt_off000103f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F5 11028 bytes
SHA-256: 0d196a0eb57ef5cb41db8210fd172c8fdafbe7b78df099773c76b116898be606

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