Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ab29aae9b05046…

MALICIOUS

PDF

68.1 KB Created: 2020-12-26 19:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 13b69a5214f9c90c73b566f9e195f963 SHA-1: 2d6798bb820fa8c588a79fa7dfe1b5440dd8c846 SHA-256: 08ab29aae9b050466bfb3873028bcb9c4f27f80a1251f74e91e97f554194fb8e
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 0.9998

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://traffnew.ru/strik?utm_term=tamil+nadu+government+forms+pdf PDF link annotation
    • https://cdn.sqhk.co/munemuzabuk/dSidqgj/stellar_password_recovery_for_outlook_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/jamolipa/R9giBtg/jizefiwokerodi.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/ijdhgif/ps_monthly_games_november_2020.pdfIn PDF document text
    • https://boraweterepin.weebly.com/uploads/1/3/4/8/134864111/petef-towodi-ralewo.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/jejulurowev/8691429675.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/agile_methodology_powerpoint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/agastya_samhita_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859cf420-b6a7-4dbe-b70c-6a916a46889d/27815801651.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/34221003506.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/largymore_primary_school_inspection_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/game_of_thrones_intro_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/las_aventuras_de_don_quijote_y_sancho_panza.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/bexubagatokimopun.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/an_appeal_to_heaven_book_dutch_sheets.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_off0000cba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA3 5372 bytes
SHA-256: 93ca33552a387fbc3c60802be6db556ce0274c6fdd86b6d641c6e3e737401f39
font_01_sfnt_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 11172 bytes
SHA-256: e253ab8087fea025fccacbd49cdcbe783d8a6a760e3b828309d547764d039030

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