Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ab2400c0594806…

MALICIOUS

PDF

92.3 KB Created: 2021-04-01 18:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a78b4c5e6c5c8c4781064a8743735074 SHA-1: c29ec918c5e3c28dc559948c51dc8aa004748d50 SHA-256: 97ab2400c0594806850ff58a13ef02dfdb733d5bdfc01d5de27bc4c6bedea754
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate the document's primary purpose is to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/123?utm_term=doctor+directory+template PDF link annotation
    • https://cdn.sqhk.co/zowajomi/aTEPyhi/13678917771.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/8780470.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/fgeiahh/new_york_city_fc_development_academy.pdfIn PDF document text
    • https://damujulul.weebly.com/uploads/1/3/5/3/135335913/2233346.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/digPYcY/torudojonufuwevu.pdfIn PDF document text
    • https://zipifotudesa.weebly.com/uploads/1/3/0/9/130969604/2074702.pdfIn PDF document text
    • http://kenurexil.22web.org/agenda_2020_y_2020.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/vobawibixavibij-nanobil-gunujo.pdfIn PDF document text
    • https://pufoputinagof.weebly.com/uploads/1/3/4/2/134234879/91da590852fc13d.pdfIn PDF document text
    • http://rakajipof.22web.org/12490898636.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/jib7Mgf/breda_academy_uniform.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/nijudow/66610467469.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/fiddler_on_the_roof_tradition_broadway.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/87089083424.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_684822c86c7841b6a24f5cd05ce7eda0.pdf?index=trueIn PDF document text
    • http://pegowalinasaduk.rf.gd/background_color_code_android.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/best_calculator_vault_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/agent_orange_registry_worksheet.pdfIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_83b8cd405c5f4445bbe5a10262aec774.pdf?index=trueIn PDF document text
    • http://zegemipufe.epizy.com/jexobusor.pdfIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_ce6ced1e491843ecb17c1ff649eedb0d.pdf?index=trueIn PDF document text
    • http://futilanejorowof.epizy.com/birla_mutual_fund_redemption_form.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_off00012c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C96 5144 bytes
SHA-256: e35c9a61c82992daddec165b6859161fe8e5a0594c4f2e6560cc903388aac568
font_01_sfnt_off00013e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E0C 11088 bytes
SHA-256: 63d4bb43d9bcdfe981b9af7369b77d5c7448a4c71dd4230b36c3d61845ae6e43

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