Malicious PDF — malware analysis report

Static analysis result for SHA-256 046c6efc8fb8beed…

MALICIOUS

PDF

79.7 KB Created: 2021-03-23 06:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0b949ae2e7d3c884a349d1da6f4cd2a8 SHA-1: 4ecba2842ab45b7a074196c06a1f28f3f8943816 SHA-256: 046c6efc8fb8beed8ca62b3510dd2a02a3dde58e3eef54d153325e6ea280efe0
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URL and the document body, though partially corrupted, hint at a lure related to a 'cryptoqueen' story, likely to entice clicks to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=is+the+missing+cryptoqueen+a+true+story PDF link annotation
    • http://suvudidimojux.22web.org/estrategias_de_enseanza_aprendizaje.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/mowobezusobuvimunur.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/62892101616.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/automation_tia_portal.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/liziremolote.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/25888834337.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_82e236d894794ecea87bae3465dca410.pdf?index=trueIn PDF document text
    • http://povodakav.myartsonline.com/vokajalama.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/accordion_fold_book_template.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/h_pylori_eradication_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/ejemplos_de_monografas_ya_hechas.pdfIn PDF document text
    • http://midexudotag.epizy.com/76836632675.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/what_kind_of_paint_do_you_use_on_a_bookshelf.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/winemugozafokidolapizes.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/fikiwogazemev.pdfIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_0d6f98c58dcb4650ab74f5f7a93c2aeb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kofabube/bmw_x7_vs_x5_size.pdfIn PDF document text
    • http://lafagelupuf.myartsonline.com/80726313415.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/26322721458.pdfIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_be98bbc859704ac3b9c0fa1d85cebfc5.pdf?index=trueIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_ad64d6382663442c829e113baf4bd9e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mixanaz/51307650526.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_off0000f995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF995 5480 bytes
SHA-256: c51807d05f0513265d12d7303364fd9d890994987ea80f962eb719157269c8c0
font_01_sfnt_off00010c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C18 10996 bytes
SHA-256: 1d7632426968567a88a0206e427cfe00ce9131f35984326280efbbfb75e2a026

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