Malicious PDF — malware analysis report

Static analysis result for SHA-256 740a8963290f0759…

MALICIOUS

PDF

76.9 KB Created: 2021-02-18 19:16:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 952c63d0806083c55cab744253406cca SHA-1: ea23dea5cbcdf1083f1f5b325b9605413b026df3 SHA-256: 740a8963290f0759056a1684950d0dd36d9881f42db93989c415eecdd9ec466c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' reveals the presence of numerous external links, suggesting a phishing or SEO spamming campaign. The embedded URL 'https://baarspo.ru/strik?utm_term=benner%2527s+novice+to+expert+theory+background' is a primary indicator of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=benner%2527s+novice+to+expert+theory+background PDF link annotation
    • https://vowagogo.weebly.com/uploads/1/3/5/3/135307183/posewunufosi.pdfIn PDF document text
    • https://rojanudase.weebly.com/uploads/1/3/0/9/130969060/c12f5913a5e0f.pdfIn PDF document text
    • https://gawudizilox.weebly.com/uploads/1/3/5/3/135300959/1fb73eede6dc.pdfIn PDF document text
    • https://vewiwuxipax.weebly.com/uploads/1/3/2/6/132681682/5904346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387046/normal_60011fef8ba1f.pdfIn PDF document text
    • https://lakowabanitewot.weebly.com/uploads/1/3/4/8/134898259/7521284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_5fd2c40b1cdd2.pdfIn PDF document text
    • http://prizinsta365.site/word_meaning_from_context_clues_worksheetsnp2hj.pdfIn PDF document text
    • https://zasawebisev.weebly.com/uploads/1/3/4/8/134865024/5092bc98cf281.pdfIn PDF document text
    • https://miragojed.weebly.com/uploads/1/3/1/6/131637546/9383181.pdfIn PDF document text
    • http://damvglaz0.xyz/loctite_270_datasheetydc8y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375525/normal_60011b195ec41.pdfIn PDF document text
    • https://domemasajexal.weebly.com/uploads/1/3/5/3/135304114/kakujajatovawi-peled.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
    • https://s3.amazonaws.com/moduxanakuri/jacksonian_democracy_dbq_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/animus_and_anima_in_fairy_tales.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/aditya_birla_finance_annual_report_2018-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/love_blossoms_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/botim_for_android_link.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/nawowisumajive.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/54706457531.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_off0000def0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF0 5700 bytes
SHA-256: 8fd1f3991d8e55ddccce94ce630c9b0cea36b90912099d32975fd9a24b312839
font_01_sfnt_off0000f25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25E 10908 bytes
SHA-256: b31332dbf5db3464f44f0fd418c778dc172645e2990125776f12793b9227e5a8
font_02_sfnt_off000117cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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