Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be5403fffd2d56d…

MALICIOUS

PDF

79.5 KB Created: 2021-03-18 07:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c5957699db1a5d59fb761f223bc658e1 SHA-1: 9541197d99811b28016391369e461aff2eb48b01 SHA-256: 3be5403fffd2d56d422e6135c560ee3d2d068788c96a4351bd8e41b7d68cb87f
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://zajinet.ru/wix?keyword=ffxiv+highland+parsley+location PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443574/normal_604f4265172fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446490/normal_5fde8e2e6be3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5ff828a648c51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454545/normal_6005f679efaec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485696/normal_602e4a3b3bbb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_602b411b8d39f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476577/normal_5fd63380dc323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458412/normal_60379d98baf22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415061/normal_5fcb3c2454bbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465262/normal_6000c9f61f451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465015/normal_5ff383c0ae9cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415292/normal_6043e62a50ea9.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/80fe5b46-9750-4ebc-ac38-c40fef27549a/los_crimenes_de_la_calle_morgue_edgar_allan_poe_resumen_corto.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/advanced_english_comprehension_test_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51f8e04-a454-437a-b583-94f49e5b5300/72109991785.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/36285345969.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_off0000ec73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC73 5600 bytes
SHA-256: 7cbf71c069418cf58454b11f8c37567a32822557e428bca102fb923d6990cd2f
font_01_sfnt_off0000ff97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF97 16144 bytes
SHA-256: 74f4c2958866d252a3f717417d322862ccc91c1f6a73053a20c78da0704e1ace

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