Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dbe17dc6d41ccc0…

MALICIOUS

PDF

90.3 KB Created: 2021-05-03 23:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: df8be1430a6a85a8b1514cad46282e6d SHA-1: ed531493bf9b9e01d863eea68b8635541d5bd32b SHA-256: 5dbe17dc6d41ccc0906bf286cd5862866fbbd57b4d28111a6622d1e9f3218627
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with one primary malicious URL being resalured.ru. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=small+engine+mechanic+school+online PDF link annotation
    • https://cdn.sqhk.co/xuzalolotagi/CjgjjWB/airbnb_ipo_date.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/68370979508.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/2xjgBji/busureviwegawix.pdfIn PDF document text
    • http://rusadezebep.mygamesonline.org/9228038257.pdfIn PDF document text
    • https://cdn.sqhk.co/jutalufelex/dtif4OW/international_business_management_jobs_salary.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/design_of_series_voltage_regulator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_69f57934e2274c20a0fe5604faecf661.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gazitif/excel_spreadsheet_for_paying_monthly_bills.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/bodybuilding_workout_timetable.pdfIn PDF document text
    • http://mosafipunot.epizy.com/bazovuvawipuwozikulagu.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/40534218995.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/how_to_scan_from_canon_printer_to_pc_windows_10.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_f795613a6d96452b9816b8532ecee0e3.pdf?index=trueIn PDF document text
    • http://lijowavatajo.myartsonline.com/bwv_1055.pdfIn PDF document text
    • https://0a3880f2-9bda-4900-b484-73a003b8a878.filesusr.com/ugd/3cbe5d_3aa21f1c3eaa42e789bd6797d49e966e.pdf?index=trueIn PDF document text
    • https://9301df3d-c689-496c-811c-0581e5fecd74.filesusr.com/ugd/f62067_c3c474203455401b969a6b75542ccdd8.pdf?index=trueIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_b2714ce733fb40b8b22ccb47f496a664.pdf?index=trueIn PDF document text
    • http://wolobugoxew.myartsonline.com/will_grayson_will_grayson.pdfIn PDF document text
    • http://wavoxobugoron.epizy.com/56959764504.pdfIn PDF document text
    • http://gisobugiwe.rf.gd/frame_relay_and_atm.pdfIn PDF document text
    • http://xowudibopope.epizy.com/ridepozabesadav.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/amortissement_dgressif_maroc.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/best_android_games_with_controller_support_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/here_i_am_lord_dan_schutte.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_off00012211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12211 5220 bytes
SHA-256: 800302ac27da398ffa6704c642bebcc36024015070be9c8312ff944a2166b3c0
font_01_sfnt_off000133a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A9 12064 bytes
SHA-256: 166e71029daf11372d28b7c2926a59ed50c2da80f8eff110e4d498d0a80bfb81

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