Malicious PDF — malware analysis report

Static analysis result for SHA-256 932980b4f4c6199e…

MALICIOUS

PDF

76.8 KB Created: 2021-03-04 00:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bb671861447e26a66e69c66d6227fef6 SHA-1: 9e493d7b911a788ebef9a3f80ed38f31e6fe2b4a SHA-256: 932980b4f4c6199e928b7c9ad28e1a1a1feaaef1aa6062199205b5aa5f34d778
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, many pointing to Weebly and other free hosting services, indicative of a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically related to phishing and potentially delivering a trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

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://resalured.ru/123?utm_term=capital+market+line+-+graph+and+explanation PDF link annotation
    • https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/8efea14bdc746a.pdfIn PDF document text
    • http://wamimexololiwam.iblogger.org/jofabarufuxopod.pdfIn PDF document text
    • https://buvonage.weebly.com/uploads/1/3/0/9/130969236/94730.pdfIn PDF document text
    • https://lakomefolowe.weebly.com/uploads/1/3/0/7/130776578/rurop.pdfIn PDF document text
    • https://fukuzodi.weebly.com/uploads/1/3/5/3/135329923/7103539.pdfIn PDF document text
    • http://saveyoutubebot.com/how_to_read_a_7_function_digital_multimetersagfg.pdfIn PDF document text
    • http://wiwajekirutiw.scienceontheweb.net/54957179398.pdfIn PDF document text
    • http://classkaod.ru/manual_pactware_4.1tf5kr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakekaririwofas.rf.gd/82011663120.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/tajamoxamopowedivibu.pdfIn PDF document text
    • http://xatudoxi.epizy.com/create_reference_page_in_apa_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/duplicate_checker_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/lights_out_configuration_utility_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/totitibavokelabelitubo.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_off0000ef06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF06 5264 bytes
SHA-256: 4c59b8d8fd2b97f03b562f6dd878d53e5379639627c90504b13b5610cd17d598
font_01_sfnt_off000100c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 10928 bytes
SHA-256: 4e4728b67cfe7b0d679735177ac4003f3416d3b8450cd1cab1e2fb59fd154de4

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