Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c75662b5a49a5b9…

MALICIOUS

PDF

69.6 KB Created: 2020-12-27 08:21:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a0cbd1b63f6286737e1e2c598d895f06 SHA-1: bceedfd067aa22b94df6f3d6a34858cba37b0d00 SHA-256: 8c75662b5a49a5b9a768f2b64164e15ad9353f5143e000500b1ca564b76ea864
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 at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a link farm of 28 external PDFs, suggesting an attempt to manipulate search engine results or distribute malicious content. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=searcy+ar+cattle+auction In PDF document text
    • https://cdn-cms.f-static.net/uploads/4423428/normal_5fa27a2a622b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_5faf9ebcbfd4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444875/normal_5fbeae77a342a.pdfIn PDF document text
    • https://cdn.sqhk.co/vixonafom/ifieijV/meniv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413244/normal_5fdafd4e883c9.pdfIn PDF document text
    • https://cdn.sqhk.co/fojufifef/jjhgghd/change_text_color_in_photoshop_cs6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_5f9357b0dd3ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_5fb2d79eb62e2.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/7949030.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/3e232e00-c03d-4d5b-af08-62dec3e82ece/prema_ishq_kaadhal_full_movie_hd_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/connect_the_dots_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/sight_word_can_worksheet_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9963765b-3bb2-451b-bed2-002ae7a01547/zuvufasivuzoxixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dac7cc9-e79c-44bc-81f2-e1262a9a9e52/sistemas_informaticos_prendamex_s_a.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_off0000d401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD401 4820 bytes
SHA-256: 214557a87805e608fa1f5114d033b88a5a8afd505fd336cf950ac775046e9fa0
font_01_sfnt_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 10888 bytes
SHA-256: bc496df7ee9c428683fdc88cb96c4cbfbd6ca710f9f2c50f1cdd3eda7a6a90fc