Malicious PDF — malware analysis report

Static analysis result for SHA-256 5957cddec52dbf8e…

MALICIOUS

PDF

105.3 KB Created: 2021-05-18 18:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1b2e5a7520083021b9fb0f1b1916fabf SHA-1: 9c96436b4417b0e09d7076ffff7f12cf147a6bfb SHA-256: 5957cddec52dbf8ef08acd0de18b529fdf7456e795bab53b713bdccc57048654
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://jacksth.ru/strik?utm_term=el+libro+de+los+espiritus+allan+kardec+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379500/normal_602072d269ae6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450727/normal_605613e8201fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_5fda2a97c88b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481509/normal_6008f4d241510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_605bc6538fd4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372735/normal_5fef0fb2b90d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_602cdd8574720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482207/normal_606b38e4e89e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nokiva/whirlpool_refrigerator_rebate_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa7a9cc-e859-4b71-9e05-e91e450dbb3c/numerical_recipes_in_python_alex_gezerlis.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/wow_druid_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/pevisojiza.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/morattu_single_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/badlapur_full_movie_in_hd_avi.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/2018_calendar_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/rv_awning_motor_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/42860840192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231bbb72-277d-4e0d-889d-569d78cd10b5/how_to_be_a_good_production_engineer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac5fe4d-b38b-4dbd-b9ef-719d1eb1bae7/middle_ages_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/93569572259.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/national_heart_foundation_heart_failure_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/toyota_sienna_2006_transmission_price.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_off00015bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BFA 5404 bytes
SHA-256: e05e16c9c49d097fa2aee58af63751101b6d88fe8dc23c816348de98bc74e4d5
font_01_sfnt_off00016e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E63 11988 bytes
SHA-256: 994c731a039dddf8602719e86fff1c0167f1db47cf5954554411cda191a5e7e4

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