Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc9d15f8128c459…

MALICIOUS

PDF

71.4 KB Created: 2021-05-25 00:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a103d71ac9c2a538024ed868293146d3 SHA-1: 70071d434b8f5ab228b7fa0fdd0edb708337c8f9 SHA-256: 2fc9d15f8128c459818016880f867d7acf76f997c95ac8223be62023bfbeb146
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 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=bolt+torque+calculation+formula+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454043/normal_5fd6ac54efb4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480585/normal_60604f95b28d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_606e2df759998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451927/normal_60443a1e3c375.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/7107bb17-0d5e-492a-8779-b2543ef1bb84/47467572210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab95538f-1d33-4c8b-b76c-988376c9fe2f/30451912508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46952598-3a4b-4bee-a415-e0d24627e940/24527725066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52d6f61b-4f2d-4733-b48a-f950d02f0790/vubowavurarawu.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/watuxegadunidukewaguximaj.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/jeruzasezezasutozurawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29632e71-9645-459b-9292-e504b72c532c/what_tax_deductions_can_i_claim_for_working_from_home.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/how_to_report_independent_t_test_apa_style.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/89946663492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49617cca-db00-4c7e-925a-d5f50f60e142/stories_with_holes_nathan_levy.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/lapenasetud.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/18673442702.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/93841609775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4827b1c-bff2-4ed5-9308-55d1d1b37ce4/who_is_the_killer_in_the_outsider_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62aa6a8-87b2-45ec-b683-63e6d436e342/sims_3_supernatural_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d359360-0e37-4102-a093-b675fd0710bd/folopovoxopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f5a30c7-98b7-43f3-b6cf-4d1b455e3f53/understanding_movies_13th_edition_free.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_off0000d9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DD 5296 bytes
SHA-256: 9d47ba4cfe789b909389ebd8ec4cc43a7e7ad82b2e1866aaf8074447954ada1e
font_01_sfnt_off0000ebcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 10648 bytes
SHA-256: 78c3a9e82a8a5a167991afd9e8b396726507c68a7483ad17fe4deac09837be66

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