Malicious PDF — malware analysis report

Static analysis result for SHA-256 73dc7b812e6a97bf…

MALICIOUS

PDF

74.8 KB Created: 2021-02-21 19:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4b3b08aba7d8cae7010f889934e4712e SHA-1: f1ef0d15942f1091913cf53a80fc9d67dcc63189 SHA-256: 73dc7b812e6a97bfff8bab975495dcb4529965960ba9095a7cdc65455ce50ce7
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 presence of numerous external links, such as 'https://jottigo.ru/wb?keyword=what's%20yo%20yo%20test%20in%20cricket' and 'http://ziwezamo.epizy.com/wugozeg.pdf', suggests the document is part of a link farm or phishing campaign. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/wb?keyword=what PDF link annotation
    • http://zixosoliga.iblogger.org/85573121213.pdfIn PDF document text
    • http://sekegixederixit.iblogger.org/sbi_anywhere_software_for_pc.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/piwidiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwezamo.epizy.com/wugozeg.pdfIn PDF document text
    • http://sogirujik.rf.gd/niwedupaxadiravilis.pdfIn PDF document text
    • http://peguretunemidom.rf.gd/foral.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/89502027833.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/buxosupapuwudukevegix.pdfIn PDF document text
    • http://gevevutonixojub.epizy.com/96629158350.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/free_vegan_keto_meal_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/best_adhesive_for_acrylic_sheet.pdfIn PDF document text
    • http://vaxesopubowutuf.rf.gd/heart_block_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/19910267901.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/93480004174.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_off0000ea74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA74 5068 bytes
SHA-256: 62e5100c8dbab3e2e535806201e7c0a630a3933fa7fc650d44e113b4b0e7f5dd
font_01_sfnt_off0000fbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC6 10024 bytes
SHA-256: b9ab8b4f9e31d993d67dfe5f568913f43ff6b6efd1a27fa1ab5c0ffc84777c8d

Open this report in the interactive analyzer, or submit your own file for analysis.