Malicious PDF — malware analysis report

Static analysis result for SHA-256 c800eb58813de7fd…

MALICIOUS

PDF

108.6 KB Created: 2021-04-19 13:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e3dbcf7bd0465e5a36252f00662e26f6 SHA-1: 9896e5bd7d2b019bb3cfc31d435624be2f82bac8 SHA-256: c800eb58813de7fd03d3170f6b1fb06a5302c82ffdcbc4263468e06e78f58260
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 0.9976

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://botokaw.ru/strik?utm_term=burning+spot+on+scalp PDF link annotation
    • https://tubomomumaxef.weebly.com/uploads/1/3/4/5/134508744/parumuresalivazexuvu.pdfIn PDF document text
    • https://benodamefeju.weebly.com/uploads/1/3/5/3/135346815/a1a2b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383567/normal_60559c2fee3bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448343/normal_6022b4bdb4842.pdfIn PDF document text
    • https://dogaralezuj.weebly.com/uploads/1/3/1/6/131637140/ginek_nepef_jisosatepamufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_602fab2edee4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472793/normal_601b0aba11677.pdfIn PDF document text
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/rokunijizekobasem.pdfIn PDF document text
    • https://kevafesituwa.weebly.com/uploads/1/3/4/0/134040773/jukigo_rakekame_jegidifawaw.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/tisegovofu/49727379928.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/growth_of_coliforms_in_milk.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/lesorat.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/how_to_stop_self_destructive_behavior.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/bd_live_tv_channels._apk.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/4814130786.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/grigori_grabovoi_methode_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/action_priority_matrix_template.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/10073856928.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/john_deere_x324_for_sale_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/22285272484.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/auto_clicker_no_ads.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/email_signature_html_code_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/83797786741.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/triangle_congruence_homework_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/wizufutasazetilor.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/7999821784.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_off00016dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DDA 5148 bytes
SHA-256: 21d1ed1c05723cee1c28ccc5e51303b190fc46d01834965ea0086525e6f4d3e8
font_01_sfnt_off00017f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F74 11144 bytes
SHA-256: bfa2f9d87f373730ca7fc8fdb18763237051f752ced5b390e2a8cf5a5b14d3d1

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