Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb8dccbada1ba17…

MALICIOUS

PDF

74.1 KB Created: 2021-03-06 21:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f388dad72523dff9c2cb0c928311403e SHA-1: c75ca1cc0ddcb4493aac379f0ecfa59b7e7caae4 SHA-256: 7bb8dccbada1ba17ddf05d98c0e0a30303777082ef969ff4a90e8db220d4139b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL, https://midufefew.ru/wix?keyword=jenny+and+the+ess+dog+chords, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to the URL and appears to be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/wix?keyword=jenny+and+the+ess+dog+chords PDF link annotation
    • https://cdn.sqhk.co/kutupejotige/81X6gjN/42004044171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5fd0a16b6d898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385852/normal_600c89d1249a0.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/Ejhhhxy/thrive_savings_goal_managers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502336/normal_5ff1b0f8306fb.pdfIn PDF document text
    • http://nukels.xyz/bikakalavazapureloropij9upto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489717/normal_600760c10629e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478415/normal_60262db4e2edb.pdfIn PDF document text
    • http://profibrend.ru/great_writing_2_great_paragraphs_5th_edition6z1xn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452612/normal_601f9a69cc30a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412896/normal_602be7eef1a0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423431/normal_5fcd3470949d5.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/rijji7c/hay_day_online_game_download.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/php_rest_client_oauthdeygr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475382/normal_5fe831f178db5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_6018393dde516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425211/normal_600b4700f1446.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368505/normal_5ffa41331875b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370266/normal_5feed05d693aa.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/09ebd41f-06cf-497d-af24-7e32ff411cfd/suralede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383f5099-18e6-466b-ba8b-4ea3cc873795/minn_kota_talon_10_vs_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7db4286-b064-48ea-889e-877424ca99fa/vz043_remote_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f235c53-514a-4b95-a814-8fe2602f9624/epson_wf_7520_manual.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_off0000e720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE720 5260 bytes
SHA-256: fa0af7a91268a85b59a5eedc4577856bb7b74de179a8d5fb0e072b2e2a5af793
font_01_sfnt_off0000f903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF903 10004 bytes
SHA-256: 433c0dc7d59a7dc281de01e227411b2a97c9c7c0f33435018620823c5ade4aff

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