Malicious PDF — malware analysis report

Static analysis result for SHA-256 f277fb847b048621…

MALICIOUS

PDF

76.0 KB Created: 2021-05-26 19:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 350bf903059b56def3b809efd492145c SHA-1: 3e78c865d4bf0de4d7e5521f82f7447e98ec8602 SHA-256: f277fb847b048621db2c9497dac5c0a0b0a7bee450429b9408d63a2a9b44d5cd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic firing for a 'PDF_SEO_LINK_FARM' indicating a mass of external links. One of these links, 'https://soxebez.ru/strik?utm_term=transformer+repair+workshop+pdf', is directly associated with the file's content and likely serves as the primary lure. ClamAV detection and ML classification strongly indicate malicious intent, specifically identified as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=transformer+repair+workshop+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376621/normal_603bd1339063c.pdfIn PDF document text
    • https://fifitedogij.weebly.com/uploads/1/3/4/7/134747960/lavevig-fowafukelix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460066/normal_5ffe96bfc016a.pdfIn PDF document text
    • https://ridimejaxokixis.weebly.com/uploads/1/3/5/3/135340331/5dcf7.pdfIn PDF document text
    • https://goxanakevixi.weebly.com/uploads/1/3/4/8/134857001/vuvepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403959/normal_604bbbd7e4f0e.pdfIn PDF document text
    • https://lotetirupaxep.weebly.com/uploads/1/3/4/0/134013035/malafavegob_lunafobetubedaf_sefofuvupiw_raloxowalakuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427287/normal_6004e3fb98b49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490364/normal_600de6da19082.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421341/normal_600676c22087f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455672/normal_604dab5db7b7f.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/fafb62c3-5535-400f-af36-4a93341331db/rheem_hot_water_heater_consumer_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af89e75-b51e-4f5a-b550-1bf98486c98c/naruto_shippuden_volume_113_cz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccaf4f4b-982d-47db-9a49-bb0a393e4c7b/33921840208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d3784ca-4efa-49f6-bbdf-bc10fecc3acf/lavedudovigodoxojoguja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/137ae38b-dafe-4fb5-9c32-66ae2fe49988/jigixukifovogixediz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb01320-a1e6-4669-af56-00d8799abed8/sistema_politico_mexicano_maria_amparo_casar_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5be6adf-e9e7-417d-9212-e80749bba7e1/10_challenging_interview_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b234b869-1db7-4999-b3ef-a0746f606136/87707620141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b8e2e4-796e-46c3-81c8-4e4cafa0c756/honda_hrr2168vka_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ebf091-76b6-4649-9ec5-60456d34daaa/libro_marketing_de_ricardo_romero.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_off0000ec47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC47 5356 bytes
SHA-256: c7fc297fcb08d0c69fce4a4cd430c6d5e28d043541901f145230d1cf40e9ca1d
font_01_sfnt_off0000fe60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE60 10780 bytes
SHA-256: 6bd5ba71822655dd9f399ff5d083922f3910c1cfac3a513a87451dc408dcf174

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