Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05e27e29099faa3…

MALICIOUS

PDF

78.3 KB Created: 2021-04-02 00:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 060a7f0c0fd215fa721bf05f69d7e994 SHA-1: 76b47393803cbee7a161c4d9baea5de18cedd488 SHA-256: e05e27e29099faa3f70e35c8eeed991f449ad9500432cd8b400570271c95deae
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a link-farming or phishing campaign. The embedded URLs, such as 'https://leonvi.ru/strik?utm_term=what+are+the+hours+for+walmart+today', are likely intended to redirect users to malicious sites. The ClamAV detection and ML classifier further support the malicious nature of this document.

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://leonvi.ru/strik?utm_term=what+are+the+hours+for+walmart+today PDF link annotation
    • https://mitapesazo.weebly.com/uploads/1/3/4/6/134652839/7846991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411921/normal_6046d95d6ac64.pdfIn PDF document text
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/7885025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469378/normal_5fdc84b810997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417220/normal_5fd7f5ac82291.pdfIn PDF document text
    • https://kozamewibigox.weebly.com/uploads/1/3/0/8/130874388/5868991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460063/normal_604e6ca4aed14.pdfIn PDF document text
    • https://joxedobiwot.weebly.com/uploads/1/3/5/3/135350216/torodolodexutomudez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fujebudavitasoz.epizy.com/wokivimekekozawituvurapod.pdfIn PDF document text
    • http://zonefodewev.rf.gd/91343623197.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/gekow.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/gamozajonejadovu.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/best_powerpoint_template_for_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/lokanedoselojikagewupi.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/gipemobokadubedem.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/samsung_knox_manage_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/reromojiperamoxufikas.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/how_to_weather_a_storm.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_off0000f4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EA 5356 bytes
SHA-256: 029ee93ea4c1a50a122fcffb67bf794ce514de776015f9d320fa1dde1018368b
font_01_sfnt_off00010712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10712 10952 bytes
SHA-256: 51ac3d3c4b1e18b6cbfd8a7376c6ac86144f400aa4ef2e036563bb512663fe84

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