Malicious PDF — malware analysis report

Static analysis result for SHA-256 859a5b057458903c…

MALICIOUS

PDF

75.0 KB Created: 2021-04-01 00:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e6082c87e70f28c12143d9a82b601346 SHA-1: 17d10b2946425edeef35edf2f818e0258ef0c803 SHA-256: 859a5b057458903cc4fa7f12538a1c76aaa1f7b99d12bc7981700fd8773ab8a3
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 0.9998

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://kuzutuzo.ru/strik?utm_term=fundamentals+of+pathology+pathoma+2020+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/korulifesewa/bgfKOjf/veduxepakop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485434/normal_5fe2add3117ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385216/normal_5fe2501ff188e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427104/normal_5ff77f8f271d2.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/cQ2k5fb/77192092742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454167/normal_6029fcfe11fa6.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/cd83d7f7-fb27-49d2-ba5d-6b35b2cc8675/posozasija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3177f2a-c602-4e33-a5dc-afc24c0a01a2/netgear_powerline_av500_reset_password.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/be-_upsssc_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/gst_authorised_signatory_letter_format_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f50dd29-e403-460d-8f22-36e729d256b7/21811383562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24bd48c1-f76a-4966-8695-721840b36923/how_did_the_great_depression_affect_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/43065411329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b2df0ff-9cc4-4832-8b6a-8c7d1daa8a66/84646891344.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/dr_khader_vali_books_in_telugu_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5938e434-f2e1-40d1-a3ac-1cb5b99f794a/wupagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23df3587-8d1b-47aa-8e33-032d962d4018/60193673416.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/19772656211.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_off0000e653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE653 5880 bytes
SHA-256: 96343db77731065ac37a054456894d63ac31ea4779ede56ba8fa313e9fbd6aad
font_01_sfnt_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 10608 bytes
SHA-256: 54ba65c9678bc14e060529f15b29d350fa7748fba6a751cc2e1ca5dc8c351996

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