Malicious PDF — malware analysis report

Static analysis result for SHA-256 6217b9aaac13b05f…

MALICIOUS

PDF

74.2 KB Created: 2021-05-20 16:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 891b481fe26648e7b22420977b855700 SHA-1: b0a9aae37c397c1a4b4ec607300fc6f260e77c50 SHA-256: 6217b9aaac13b05f59a028a01fdb09f07113ff0a4c3ace48fc0018d5427413bb
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=kis+kisko+pyaar+karoon+full+movie+watch+online+hd+720p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365576/normal_6050628c26ef0.pdfIn PDF document text
    • https://dixonojobu.weebly.com/uploads/1/3/3/9/133997274/9014778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_603a1a6812123.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382187/normal_5ff755a897198.pdfIn PDF document text
    • https://muxapikaw.weebly.com/uploads/1/3/5/3/135346573/sumozudila.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/rexadig_letunobadaminob_fovetekogu.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/mukut/application_at_unisa_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/fusetegebaxebowuso.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/pevajotabederuka.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/pusexusazenafojedorovi.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/automatismos_industriales_paraninfo_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/bogan_movie_villan_bgm.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/suzekivat.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/medical_laboratory_science_review.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/rebapovukowimeboza.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/tananamubemiwep.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/wekiju.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/94819398978.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/susugemizogimifizifet.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/bangkok_city_map.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/2014_census_report.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_off0000df7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7B 6036 bytes
SHA-256: b8f7a0bc658fe528d8184928a58da28d4e898d5954ac505e057692ee514abbba
font_01_sfnt_off0000f407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF407 11404 bytes
SHA-256: 08c18ac9d7b3bd561d54cd35eda3067f5ff44b53c50745fddbaf33644f9724cd

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