Malicious PDF — malware analysis report

Static analysis result for SHA-256 f826e345055011cb…

MALICIOUS

PDF

76.5 KB Created: 2021-03-09 16:37:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1985b3286ac5090a86cd6452e948b6bb SHA-1: 24971e133dfaa5a4f83bfd14fccf6073b783d689 SHA-256: f826e345055011cbcbd080db4ff7abe33c2a26a0de2665bdc1f0c007b108569b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=culture+club+i%2527ll+tumble+4+ya+traducida'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a compromised site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/wix?keyword=culture+club+i%2527ll+tumble+4+ya+traducida In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489247/normal_6025cc88a2b29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488317/normal_5fd30d58eb561.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/icjfMA8/jaget.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414864/normal_5fcc1c64c42cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478716/normal_5ff9538bb90f0.pdfIn PDF document text
    • https://cdn.sqhk.co/bulegumu/h2zjdha/53952882857.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366044/normal_5ff9603ced806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_603c30e374fd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464523/normal_5fdb094b46faf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_5fe6f2d0d3fff.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/a78726af-949c-48db-8328-bd8ec67062f5/81034446313.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/bulimia_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/63069393066.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/homographs_worksheets_for_2nd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/guidelines_for_pap_smear_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/rejabomot.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/anaxagoras_biografia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe0f18e-f6f1-43d7-ac30-92c0d19268fe/xasuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0802276-f8b0-4d4d-80fe-2a4a33695e28/dijalone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b1f279-0f92-4e55-a45f-ba7cf2794ba7/sims_3_vs_sims_4_reddit_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b01fbb-7a40-4c7b-b6c9-843ae4b9c9a5/75386806404.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/moto_one_vision_stock_android.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_off0000e659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE659 5176 bytes
SHA-256: 461be788c3d3fd7d7d8081f7b15d28eb0667ec222172879f655edfe45a86ba9b
font_01_sfnt_off0000f7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EB 14424 bytes
SHA-256: b365a00e77d95671e5df997d50df789e250925c34a3026fb85108c8b69c65f88

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