Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f743b441661e44…

MALICIOUS

PDF

82.1 KB Created: 2021-06-08 20:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 66624cd782ca2866b14c626e37c3e060 SHA-1: 0a73c52f1103fc9e6fea96fa06f176944ea19229 SHA-256: 55f743b441661e44e77dc7c70740d51a996b914c72c50f68ba40641299879ec9
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-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://huntic.ru/pbw?utm_term=msw+logo+commands+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377391/normal_605664e15bc1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_6068cc9e50149.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/1f4c51f4-859a-4c9a-b02a-a7f899f47b29/dewalt_dcd771c2_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09164283-bec5-437e-9fc7-a457f7226a89/how_long_to_get_cia_certification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da76444-0ef3-40e2-8405-82b883b0c630/mastering_data_structures__algorithms_using_c_and_c_coupon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/843a12d3-416a-4789-9294-4d4a25f0e1ac/91303397371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29075ce8-6049-4966-a33d-ef92ce60ed86/ram_raksha_stotra_file_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b39f67-9dda-4a45-9695-2b193f706221/14264434436.pdfIn PDF document text
    • http://gabumur.pbworks.com/f/tasununixalomezinix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/237de076-1325-42d0-9074-fa83c7df8603/luxineso.pdfIn PDF document text
    • http://nagomax.pbworks.com/f/crt_tv_troubleshooting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6f123fc-50cd-4bf8-85c3-ef09407ce4ad/swingline_39_heavy_duty_stapler_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6e7bd49-f722-487e-8de7-384c6e9b642e/what_is_the_best_stock_app_for_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11606f99-0061-42c0-aa12-e1dbd9b2cbcc/what_is_iso_quality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c763f4-abb7-4424-86f0-37a8f403df46/zinidegofotibomagiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd47ac2-338a-404b-b788-c9847a020eca/project_management_body_of_knowledge_pmbok_guide_sixth_edition.pdfIn PDF document text
    • http://wigonewakil.pbworks.com/w/file/fetch/144669525/sample_question_paper_for_class_10_cbse_2020_maths_with_solutions.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/w/file/fetch/144424539/10552595416.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001020a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020A 5476 bytes
SHA-256: 0281b6db281f0b6b8563a78f1d22c8b94c71c4f5529bba7ad8b90458ed794edc
font_01_sfnt_off000114be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BE 11648 bytes
SHA-256: 93c7a984c95f5ff1e48b8082370beb28f8058cecd72063c1cc8fcf9a83040e63

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