Malicious PDF — malware analysis report

Static analysis result for SHA-256 be611c223ed1a47c…

MALICIOUS

PDF

76.3 KB Created: 2021-01-17 14:28:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 14f2aa697555edb45f8d2d00e1af414c SHA-1: d097fc379cac681692947608b7cbbb2d32f64b18 SHA-256: be611c223ed1a47c4afbd29b37ff32c7d1f826776a3ecf56d2480ef25f78f424
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded links suggest it is designed to trick users into visiting malicious sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/aws?utm_term=online+marksheet+verification+form+haryana+board In PDF document text
    • https://site-1220496.mozfiles.com/files/1220496/fedidokipev.pdfIn PDF document text
    • https://cdn.sqhk.co/popenewosaso/Khgn0id/bass_pro_shop_bolingbrook_store_hours.pdfIn PDF document text
    • https://site-1167947.mozfiles.com/files/1167947/hobby_bird_of_prey_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501374/normal_5fe99d4ba1ab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445735/normal_5fa72e75a03c0.pdfIn PDF document text
    • https://site-1174733.mozfiles.com/files/1174733/mikecrack_yo_quiero_dormir_descargar.pdfIn PDF document text
    • https://site-1167993.mozfiles.com/files/1167993/lock_screen_rotation_on_iphone_xr.pdfIn PDF document text
    • https://cdn.sqhk.co/pegidago/ijcAujj/extreme_sports_car_driving_problems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475853/normal_5fd110161e4c5.pdfIn PDF document text
    • http://wevesapawuzu.22web.org/miboliboru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421782/normal_5fc09b2b88e71.pdfIn PDF document text
    • https://site-1173734.mozfiles.com/files/1173734/71661054544.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vekifaxofezawe.epizy.com/kit_brush_photoshop.pdfIn PDF document text
    • http://femejedad.epizy.com/14865633878.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_off0000e5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AE 5652 bytes
SHA-256: 87d4c2ea738a91fcd01874af9d861aa4c46c07672677c5208a1914274eaca338
font_01_sfnt_off0000f8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C4 12348 bytes
SHA-256: a51a525b66c2ddb728b29fdea17e21a472776c2e920eec649bf17f6f079e2f97

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