Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdcaa64abfd38499…

MALICIOUS

PDF

83.5 KB Created: 2020-12-16 18:53:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7598722cd4aeeb77c599cbd39726bc31 SHA-1: 25ccea39baf9f048aa1fa334e9da272febb4bec2 SHA-256: bdcaa64abfd38499df1ae3005af3cc871b326958fb427a3861c3fc23ff94181a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a legitimate search result for 'South Carolina mountains Airbnb'. This URL, https://trafffi.ru/123?utm_term=south+carolina+mountains+airbnb, is likely intended to redirect the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/123?utm_term=south+carolina+mountains+airbnb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411250/normal_5fd399d35831c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381759/normal_5f8d3e75aa168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419003/normal_5fc336a1f1dc8.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/231f1793-09ac-4a1e-a542-a5ff22000167/blood_cells_model_labeled.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf069adeaf7179bbcf43fe/t/5fd7530be5ac5828963f20ed/1607947020675/23933979988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51e0384-8da4-4a5b-8cb8-b2495a19d1be/vimiginudowurazipidof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4f002dd96f5918e528e1/1606373121672/zunokawobejuxapojeb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfd0329c5e2669026003d/1606221059653/where_were_you_yesterday_year_3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f7fbe9fc3622d5227cd2/t/5fc2ed54e6d49a06bbf3e973/1606610264101/mixtures_worksheet_answer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc110e511f6a419848698ae/t/5fc551395147b14804e22c06/1606766905667/5448412842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2932e264-fab5-47fc-a7d0-6fc6b54bef2b/pasezumoliviso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb4513c-f436-42f1-810c-cec877e90ea3/the_very_best_of_prince_download_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00635ff13940aa23ad6dd/t/5fc23a353c02f22b9d56c65b/1606564406067/knife_display_stand.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc71ec6e2afa34b64ad0df3/t/5fc83cbbec83506b0472c11b/1606958275640/vadivikewoxonugiv.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_off00010939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10939 5284 bytes
SHA-256: 8c2b76677ecf979b172d89f24e7c64423c208728965847d105c24a4fcffbf6e5
font_01_sfnt_off00011b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B05 10888 bytes
SHA-256: b22fe91d3a78c4f976ced97b763e2beb1bab010acacc06abb870be85714d27e0

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