Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac67bb6a3b658ce…

MALICIOUS

PDF

90.7 KB Created: 2021-02-25 18:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 0d3c75693ce56764a4669192620cd98f SHA-1: f2c2edf676f2bad27b28840ef1d834b75e6b5794 SHA-256: 9ac67bb6a3b658ceebf5a042bb9b43dfdb9a0a36de17ea93c4418db317efe075
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, characteristic of a link farm or phishing lure, with one URL specifically mentioning 'assembly instructions'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=imaginarium+train+table+assembly+instructions+pdf PDF link annotation
    • https://cdn.sqhk.co/nuvurero/IP8gjie/spinning_shirts_for_sale_port_elizabeth.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/Aiehigc/pharr_road_animal_hospital_prices.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/tegugutaxunufanajijul.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/lipesaxaborewif_gebabadit.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/87562677684.pdfIn PDF document text
    • https://pawupakupofodav.weebly.com/uploads/1/3/5/3/135388754/79aefad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fubavinexazixo.onlinewebshop.net/how_to_fix_honda_mower_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/extensions_for_opera_mini_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/discipleship_essentials_greg_ogden.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/18219368470.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/25816895133.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/ratonoremowitobesiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/vehicle_bill_of_sale_fillable.pdfIn PDF document text
    • http://jokosen.atwebpages.com/61494461123.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/nibozerimaju.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/85972093288.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/99007685261.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/74376555450.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/59241401867.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001258d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1258D 23216 bytes
SHA-256: 735e04d285007e137ecc01d7dcbd9eab9979c599df9ffc35f2e22d653968c3c2
font_00_sfnt_off0000efa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA7 5536 bytes
SHA-256: be1563a338e070b0c422a44db7f3a4e99ef0c9c4d7d6717a592324b6c8fb4d5d
font_01_sfnt_off00010258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10258 10204 bytes
SHA-256: eded0c9d445c4266c3e90ccdde9b8f189c31cefc62301597ee767acf85d656cc
font_03_sfnt_off00014e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E77 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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