Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da7d7b3080b7480…

MALICIOUS

PDF

69.0 KB Created: 2020-11-30 13:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: daeff18ad5aeafa78062abc4898fffde SHA-1: 7fd09da82c9e6c83867cb8b34a7239b207945986 SHA-256: 9da7d7b3080b74802e068098c064510695d031ccec33677ab22182b54b18080e
214 Risk Score

Malware Insights

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

The PDF file contains numerous links to external resources, with one specifically identified as a malicious redirector. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to direct users to potentially harmful websites. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://gettraff.ru/strik?utm_term=hacked+my+singing+monsters+apk In PDF document text
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/ponigokazomevut.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/7332149.pdfIn PDF document text
    • https://xizukuzu.weebly.com/uploads/1/3/4/6/134606793/fosevuxe.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/kufazete/13369482573.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/watch_movie_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/44718030888.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/berks_county_register_of_wills_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/45472871642.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/67118233075.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_off0000d227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD227 5488 bytes
SHA-256: bbc22e44c7b40f1de49a725e20f18c05921bc297cf53eadeec4b6ec67384a734
font_01_sfnt_off0000e4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C6 10080 bytes
SHA-256: b1cad38401a43e190370730c70b4ef9e81b729b1a9b641fa544e2e9bddf3901e

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