Malicious PDF — malware analysis report

Static analysis result for SHA-256 97021d92a93abf97…

MALICIOUS

PDF

76.4 KB Created: 2021-03-19 07:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7d63fbb815cff3044f4f11d4d75b7510 SHA-1: df7ca62425b033b6adf40181c4616fc7dbaa59c2 SHA-256: 97021d92a93abf97b5372488d89b54312ccd315a86b45ebda7acc0e6383790ea
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The embedded URLs and the PDF structure suggest it's designed to redirect users to external sites, potentially for phishing or to download further malicious content. The ClamAV detection as Pdf.Phishing.Trojan further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/award?keyword=%25C4%2591%25E1%25BB%2595i+t%25E1%25BB%25AB+h%25C3%25ACnh+%25E1%25BA%25A3nh+sang+pdf PDF link annotation
    • http://form-lnstagramverifiedbadges.com/majuvirefsuubm.pdfIn PDF document text
    • http://rollernefrit.xyz/944967324hbthg.pdfIn PDF document text
    • http://tlgfree.xyz/how_to_remove_insinkerator_power_corduyc8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_602f20dd801ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_604491c4b1367.pdfIn PDF document text
    • http://autoport76.online/111642949625j8ef.pdfIn PDF document text
    • http://copytoshka.ru/busazesasugobu1njoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459467/normal_602f3e00c0b84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385216/normal_5fc810fc10cef.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/mafavuzenoliki/91399032252.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/telugu_andhra_jyothi_news_paper_today.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/masonite_4x8_sheet_lowes.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/pidinajupagil.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/what_was_the_purpose_of_rerum_novarum.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/1996_polaris_xplorer_400_owners_manual.pdfIn PDF document text
    • http://xenezipulugiji.atwebpages.com/8077372550.pdfIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_223db2b4cc474942b451bd38834283db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/potamotaz/nadawujatoxinemuzagimi.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/77280967002.pdfIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_f29adff3255c40399415bb34b2f0f0dc.pdf?index=trueIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_921e0bea3420481897268d36bbe11480.pdf?index=trueIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_c124afd94e1b4dda85aa32f06b3e7006.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_off0000df74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF74 5868 bytes
SHA-256: 707001cde3177e134292e5c912378184dbba16378c48199fd7ad55efac412db0
font_01_sfnt_off0000f29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29B 21236 bytes
SHA-256: 930fc5e5d8b0ad57c96c78c0b709124d656eac21723d427122590301c9b18996

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