Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d21db49de139f5…

MALICIOUS

PDF

63.6 KB Created: 2020-12-21 20:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 95a577ec2eec1db20aa538e9c7448d3a SHA-1: 742b93278dde7ff6c499ee713db5e34c5cda2dcb SHA-256: c1d21db49de139f508d1a52246e26716aab37c470164d95db7c5115f3d688bb8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it's part of a link farm or used for redirection. The primary URL, 'https://traffset.ru/strik?utm_term=new+baby+panda+bubble+shooter+game', is suspicious and likely leads to a phishing or malware distribution site. The document body, though heavily corrupted, contains references to a game, which is a common lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=new+baby+panda+bubble+shooter+game PDF link annotation
    • https://neboxikadifi.weebly.com/uploads/1/3/4/5/134588308/pijupekujar.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/xanebavifamopez/ben_shapiro_game_of_thrones_ending.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cc328bb-607a-4ed3-a65e-a06ddac0de11/fuvugenesivesi.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/80388425996.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/70441798027.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e110403f5353fd95a22f/t/5fc4d83018e72e5fdb708b17/1606735921265/xiole_xl830l_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/biological_science.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/housekeeping_basic_knowledge.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/40758368566.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/jiwubivegaxunuveped.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbf0116eb00e3c4bba69/t/5fcf5a2f05f6f27807584da7/1607424562080/titowikubivivagovedano.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1e75e6047f1ef2ef9bf5/1606229622015/koridupawamopaxelobatuji.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/affidavit_for_name_change_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13d0827a199023ab79d37/t/5fcc122524c49707d30d4ebf/1607209510720/pase_elite_free_fire_julio_2020.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_off0000b8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BC 5676 bytes
SHA-256: e6c9f668702e27e497658a9f9392e32acd1a8caa0c3f4f5540b6e7d45dfad67b
font_01_sfnt_off0000cbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF8 11408 bytes
SHA-256: 29574d3a20cf5ccb7a09450da76078f1aa97c42a07e3cd6b5372ac8e650479ae

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