Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdac6750a82fa547…

MALICIOUS

PDF

72.7 KB Created: 2021-03-24 06:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b94f9a8c2c12679e2c2b707a3a239984 SHA-1: 92a54b00a860dea6df3ba2522897c49b32d70cd0 SHA-256: bdac6750a82fa547f47a16fd4e34d4e4088e4d47dfb1cc534e209757e7c2f4ae
156 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious phishing document and hosts a large number of external links, many of which are SEO-themed. One of the primary external URIs, 'https://bologen.ru/wix?keyword=curtis+and+son+funeral+home', is likely part of a phishing lure. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, potentially involving the exploitation of PDF vulnerabilities or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=curtis+and+son+funeral+home
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/2123df.pdf
    • http://ruwemipuwev.mypressonline.com/34322533606.pdf
    • https://sunejojixin.weebly.com/uploads/1/3/1/0/131071277/9990466.pdf
    • http://bamupiwabibajew.mywebcommunity.org/24977365251.pdf
    • https://static.s123-cdn-static.com/uploads/4505699/normal_5fe3eb95dfbce.pdf
    • https://static.s123-cdn-static.com/uploads/4450421/normal_5fc8750d3a30b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kexamoxusinixu/cours_d_astronomie_pour_debutant.pdf
    • https://s3.amazonaws.com/xukonakefules/mudidevuluzakusixisaze.pdf
    • https://uploads.strikinglycdn.com/files/b4ad1d46-0cf3-4b35-a65e-515a3e1a6727/81424486513.pdf
    • https://s3.amazonaws.com/liguwubore/free_ks3_english_worksheets_printable.pdf
    • https://s3.amazonaws.com/xapidajovaji/buenos_dias_bella_princesa_en_italiano.pdf
    • https://uploads.strikinglycdn.com/files/af81dadd-6d3e-4838-8867-8520f77d870b/what_order_should_you_watch_marvel_movies_and_tv_shows.pdf
    • https://uploads.strikinglycdn.com/files/a964d131-4773-4b08-b225-80de557e544f/1412020697.pdf
    • https://s3.amazonaws.com/vaxebisapesi/area_and_perimeter_of_semicircle_worksheets.pdf
    • https://s3.amazonaws.com/vavapekadoliti/all_about_me_questions_template.pdf
    • http://zejibanunepi.myartsonline.com/35315580314.pdf
    • https://s3.amazonaws.com/xifabilejilab/wobuvebawodujagefif.pdf
    • https://s3.amazonaws.com/goneduzum/92909507892.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd6.bin
1b74eae09d2f4c9ce9048585337d2c504410bc520b087f848afdf896225dd37d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD6 5052 bytes
font_01_sfnt_off0000f0cf.bin
bd1bac49416fb90e4b8132ccb58e19c913224943b0a9a35e2d8dfddc6e98473a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CF 11296 bytes

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