Malicious PDF — malware analysis report

Static analysis result for SHA-256 be720e557182c243…

MALICIOUS

PDF

64.6 KB Created: 2020-12-03 13:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8bc4bfe803eabe9e703d9164239e0ed3 SHA-1: 1cf14da4c7b5bb2b696f06516b84b38d7487254e SHA-256: be720e557182c24385d8be378c6c311c0ffd561e4ce1920c5d9ae509dc82451e
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also assigned a very high probability of maliciousness. The embedded URL, https://cctraff.ru/strik?utm_term=is+plain+green+loans+legal+in+louisiana, is the primary indicator of compromise, suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?utm_term=is+plain+green+loans+legal+in+louisiana In PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/kovajidakarisu.pdfIn PDF document text
    • https://japiloxekafu.weebly.com/uploads/1/3/4/4/134480389/ludepibuvemaka_lusunesemego_ginulevegisibuz.pdfIn PDF document text
    • https://xukafubisek.weebly.com/uploads/1/3/4/2/134265855/1974965.pdfIn PDF document text
    • https://lalonofinesuver.weebly.com/uploads/1/3/4/4/134442061/4133554.pdfIn PDF document text
    • https://zudepiguzow.weebly.com/uploads/1/3/4/7/134774383/kevilenev.pdfIn PDF document text
    • https://bezoduremudopez.weebly.com/uploads/1/3/1/4/131437412/wojopavaxif.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/gajabedafot/auriculares_inalambricos_apple_compatibles_con_android.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/free_powerpoint_templates_slidemodel._com.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/all_information_about_indian_national_flag.pdfIn PDF document text
    • https://s3.amazonaws.com/padoragog/gmail_messages_going_to_trash.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/cracking_toefl_ibt_2019.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_off0000c181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC181 4924 bytes
SHA-256: c34fa2bb07557c1573f0bc4b4042c202466be029e682006d38a4ed5ff0ebd662
font_01_sfnt_off0000d251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD251 10372 bytes
SHA-256: 4c44ae60f0794e1023e4493d2ab00b87dd822342d8a19522c2f53df5078f016f