Malicious PDF — malware analysis report

Static analysis result for SHA-256 9723b651bcb51abd…

MALICIOUS

PDF

69.2 KB Created: 2020-12-21 22:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 714e0e7e1d0e6f1c9ecf0da0cfacb1aa SHA-1: e7aa9775970539355817e9d458aeee286b926f78 SHA-256: 9723b651bcb51abdee5db9f2d1099d086ecbdd5ca37b604d07566e0135d0e2fd
214 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to search queries, suggesting a phishing or scam lure. The presence of numerous external PDF links further indicates a link farm or redirection scheme designed to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?utm_term=nissan+cvt+transmission+repair+near+me In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406463/normal_5fd7d09eb1217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_5f9445c0ebc73.pdfIn PDF document text
    • https://removevas.weebly.com/uploads/1/3/4/4/134443453/bopifufiwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422884/normal_5f99f844568be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464055/normal_5fafdcce98b60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460045/normal_5fb938ac67914.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdd2afa6394b41d6424bc80/t/5fde56335809ae3434f87673/1608406582065/mudilepemegumejowanadaduw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c273a13a450babf34cb7/t/5fc144703f75b16643032171/1606501489846/fundamentals_of_industrial_hygiene_4th_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce900044c5de4abf39f267/t/5fd644c8164d0f203c7702a3/1607877832764/geometric_representation_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff548ef-8bc9-4b6d-8d31-d7e32c1b1db3/fancy_letter_stencils_large.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d650403f5353fd956949/t/5fc1ea073c02f22b9d525535/1606543886838/70-698_study_guide_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c3642b4-855c-4196-95d8-2f0ae56b8bf7/crystal_dragons_5e.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_off0000d427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD427 5076 bytes
SHA-256: e9166923ba3e364669f03b3df2643489529d2780865d757056442779f10b3e3f
font_01_sfnt_off0000e560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE560 10044 bytes
SHA-256: 38be73b98ae623ca97a733fdb08467992383477369b215a7e28603d3475ac314

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