Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a360f0e96a41b04…

MALICIOUS

PDF

76.9 KB Created: 2020-12-26 01:19:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0043c4974e38ce880e41214ad05de571 SHA-1: 961972f075718f3845f9cba5f0bc567ac63f9827 SHA-256: 4a360f0e96a41b0438d65bf11d7327f9357cf1d947748dc8f25760688df97013
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL 'https://trafffe.ru/strik?utm_term=amgen+strategy+2019' is the primary indicator of compromise, suggesting a phishing or malware delivery attempt. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a malicious document designed to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=amgen+strategy+2019 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388050/normal_5fc711e737f39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8708647205c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5f8ca529ad044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5fd0f4eb685a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/372b1da8-94ad-461b-b3b0-aaa2afeb2f8d/costco_standing_desk_glass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88aabdf9-957d-488d-a84a-5f77c97119e1/advanced_research_methodology_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/644bd678-af96-4a7c-8b54-cadaefc97cb9/godel.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/tam_tara_hard_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/98546390524.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/items_listed_on_a_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/mstest_xml_coverage_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3db4e75-b63d-4e92-bfd3-144a6f5fdc3e/72076390547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1f96aa-1952-4886-bcdd-f15e21af421b/22748746071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6273a4-d3f8-4c26-84f3-b2cffe68da6c/6729053583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc2e10b0-4822-46bf-a336-64b9a1a4ef56/gowol.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/atar_notes_further_maths_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE193 5176 bytes
SHA-256: 5f63f9c87ae50e974050b162efb994f194c10d9e336a8e94db2da899ed99de94
font_01_sfnt_off0000f308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF308 11132 bytes
SHA-256: 36d688f5f65e40411d2696e4616c9ce23e159de55503910fe36b3e7cf460d476
font_02_sfnt_off000118cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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