Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d1da8cabe9391e…

MALICIOUS

PDF

67.5 KB Created: 2020-11-18 08:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e00ad60fac2890e63a38d35336891610 SHA-1: df3a8ffb3f8947db142d2d9c6f8e85882be0e1c4 SHA-256: 72d1da8cabe9391e129bf35d645c397ad0ac5ede48e25442e8c3f8ffba441d03
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious or suspicious domains. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a strong likelihood of malicious intent, such as phishing or redirecting users to harmful content. No scripts were extracted, but the embedded links are the primary indicators of compromise.

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
  • 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.
  • 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.
  • 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://traffking.ru/strik?utm_term=psicologia+del+desarrollo+moral+kohl In PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/tozosejobagof_zebetawelirobax_kegetugoliw.pdfIn PDF document text
    • https://segedexulitino.weebly.com/uploads/1/3/4/6/134612069/demuwugor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb339d2-6193-4353-8ee9-cc1519b999e3/24319768216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d47d5e7-88c7-4eb2-bb22-318cabbfe9e1/reweravuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/24912935679.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/tabe_test_form_9_level_a_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/ghatna_chakra_english_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/pengertian_amoxicillin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c4d21f-37f3-4ef1-8438-7e65421bb214/timelimakix.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/como_transformar_em_dwg_autocad_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/16457154099.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/windows_server_2012_security_guide.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_off0000c7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BF 5420 bytes
SHA-256: 0a289a3a9998ae93c1cf835ecaace36fb947b17ddcdae6f8e88a3694d16a1330
font_01_sfnt_off0000d9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FF 11760 bytes
SHA-256: 29d23e82161835162c4388756fcfba5ff9c635a95c1e7403c008399eba836a1f

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