Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fb016363df3190…

MALICIOUS

PDF

75.7 KB Created: 2021-03-07 22:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2d17405593b9f3ea0d9e7659c5eff6d8 SHA-1: 42f1e06e29e6b471527fbc42ff259b3ef96eb40e SHA-256: d3fb016363df31901fc63c6db3ae899da1fde6fee3ea8b3f920822173a811724
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files, suggesting a link farm designed to host malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://jumiwimov.ru/strik?utm_term=toto+sw2034%252301+c100+washlet+installation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450630/normal_6038b8eb9b04c.pdfIn PDF document text
    • https://lufuroxula.weebly.com/uploads/1/3/1/4/131408913/bixexuxijos_pidug_likuvabazik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_602f5266ac1cc.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/xLLk4gc/31263047639.pdfIn PDF document text
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/4097967.pdfIn PDF document text
    • https://cdn.sqhk.co/loxepafigav/ha6bUjc/benixanutimodifi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414153/normal_5ff2758f09e6c.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/efee497a4f70b34.pdfIn PDF document text
    • https://cdn.sqhk.co/numexerab/Xaghbjj/vawomimen.pdfIn PDF document text
    • https://cdn.sqhk.co/dekorasenu/ijcFNhf/44465603441.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/BdLLijH/best_country_music_singers_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488135/normal_6009e2d09e935.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://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_b8b663cca7eb4ead8116b4ac8539d992.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/bronchial_artery_aneurysm_case_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/zaguz.pdfIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_81fb7233950844edbef741fc3e01f210.pdf?index=trueIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_ddbc2bc7dbb8492390ac1a705c77a22d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavabi/michigan_child_support_payment_locations.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/automate_excel_reports_using_r.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/what_is_the_cost_of_arduino_board.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_89dc341d96844e6eb206960757d9b036.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/foneniz/top_ten_deadliest_days_in_us_history.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_off0000dd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3B 4424 bytes
SHA-256: b15a684830b6ef92b38c648b90e7cf69774595ebfc30e017d298e50686e7c6cc
font_01_sfnt_off0000ec51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC51 11540 bytes
SHA-256: 6e0e06f1551fa5fc0fda2ced795e8a9917ed0f5386c75b22383bd347c8c0e38c
font_02_sfnt_off000113ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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