Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bee9f46030b2c6e…

MALICIOUS

PDF

127.9 KB Created: 2021-05-24 18:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d1486b1a86869128e9f004b6d9118655 SHA-1: 3d7ed1ea751462f8c85324f0cc735cee4e838957 SHA-256: 3bee9f46030b2c6eeae45b9cae5c2bc9c67b6c8059f79e930f512c5a7fb843b4
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm with numerous external URLs, including one pointing to 'lozipotod.ru', suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cdn-cms.f-static.net/uploads/4379961/normal_605f9cace04ab.pdf In PDF document text
    • https://wekimede.weebly.com/uploads/1/3/4/8/134862148/risonipijuzig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fc6647dacf07.pdfIn PDF document text
    • https://rodazikajoreme.weebly.com/uploads/1/3/0/8/130874285/bonijifisewor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477873/normal_6029c46126760.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413346/normal_5ff7e8ceb682f.pdfIn PDF document text
    • https://sazavilekin.weebly.com/uploads/1/3/4/8/134851962/gufexa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_606e21a0c22b8.pdfIn PDF document text
    • https://lozipotod.ru/strik?utm_term=%25D0%25BD%25D0%25B0%25D1%2586%25D0%25B8%25D0%25BE%25D0%25BD%25D0%25B0%25D0%25BB%25D1%258C%25D0%25BD%25D0%25BE%25D0%25B5+%25D1%2580%25D1%2583%25D0%25BA%25D0%25BE%25D0%25B2%25D0%25BE%25D0%25B4%25D1%2581%25D1%2582%25D0%25B2%25D0%25BE+%25D0%25BF%25D0%25BE+%25D0%25B4%25D0%25B5%25D1%2582%25D1%2581%25D0%25BA%25D0%25BE%25D0%25B9+%25D1%2585%25D0%25B8%25D1%2580%25D1%2583%25D1%2580%25D0%25B3%25D0%25B8%25D0%25B8+2019+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258CIn PDF document text
    • https://lozipotod.ru/strik?utm_term=%25D0%25BD%25D0%25B0%25D1%2586%25D0%25B8%25D0%25BE%25D0%25BD%25D0%25B0%25D0%25BB%25D1%258C%25D0%25BD%25D0%25BE%25D0%25B5+%25D1%2580%25D1%2583%25D0%25BA%25D0%25BE%25D0%25B2%25D0%25BE%25D0%25B4%25D1%2581%25D1%2582%25D0%25B2%25D0%25BE+%25D0%25BF%25D0%25BE+%25D0%25B4%25D0%25B5%25D1%2582%25D1%2581%25D0%25BA%25D0%25BE%25D0%25B9+%25D1%2585%25D0%25B8%25D1%2580%25D1%2583%25D1%2580%25D0%25B3%25D0%25B8%25D0%25B8+2019+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25DPDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/google_drive_maze_runner_3_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a314292e-640a-4aab-84da-ce29b515cdfa/past_simple_irregular_verbs_exercises_macmillan.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/fannie_mae_multifamily_rate_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db339d17-24c7-4dbc-9517-9aeb78a6da2b/plant_physiology_and_biochemistry_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/selenium-_android-_driver_maven_dependency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d707b03-36d9-4efe-8fac-e2c26b41a81c/statistical_and_probabilistic_methods_in_actuarial_science.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/45065608554.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/10483491244.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/adobe_indesign_cs6_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/litufutolofekopibigex.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/gibanupinukikugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/115e1596-c226-4728-a464-a5efbd12f536/28933491651.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/formal_conference_invitation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/how_to_deal_with_absent_parents.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_off0001a4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4D8 6488 bytes
SHA-256: c67a07fefee8d2f3ba357a14eecf7c65ac0b03fa19426724880b62c7426e56cd
font_01_sfnt_off0001ba60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA60 16624 bytes
SHA-256: 57adefb6881492f48ee12cc07dd876e6a37ff117f75db8ca1f7f448f60978f60

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