Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ec1a30568bc147…

MALICIOUS

PDF

78.5 KB Created: 2021-02-15 08:16:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 60dc109d6e4a546a43c758fa28f595d7 SHA-1: de9614b7aa346aad0d5aedc3635d171ad94bae4c SHA-256: f8ec1a30568bc1479f1f6fe380669eddef8bc1e65145a2da326c0785f860fc71
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=san+francisco+peninsula+fires In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_60246896ca214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5fd155b16f486.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464082/normal_5ff3eecc69b6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370264/normal_5fc5bb006591c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pazovugal/the_knight_s_tale_analysis.pdfIn PDF document text
    • http://xinotitatidab.rf.gd/aeroplane_hd_images.pdfIn PDF document text
    • http://taxupot.rf.gd/most_important_full_form.pdfIn PDF document text
    • http://vijesir.rf.gd/rugovasedarej.pdfIn PDF document text
    • http://kikivalisexe.epizy.com/etiology_of_gestational_diabetes_mellitus.pdfIn PDF document text
    • http://tixuveji.epizy.com/ramotegemuluzagaziti.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/80513883730.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/nozolewasijepulaluforet.pdfIn PDF document text
    • http://kakarares.epizy.com/dipimuv.pdfIn PDF document text
    • http://pixutixiziv.epizy.com/bush_s_white_chicken_chili_nutrition_information.pdfIn PDF document text
    • http://pixagese.rf.gd/97706057771.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/67679795933.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 4912 bytes
SHA-256: cedb01e9426c22bfb34167645b7caf4d702b8c50c1325149ed7e0e46b0aa47ee
font_01_sfnt_off0000fb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB46 10396 bytes
SHA-256: 2f429884457eed7db8aa87f0c65deaf83db1afc5469f04d5a9853207e7c3ca4f
font_02_sfnt_off00011ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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