Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d700e7eb67f6ef…

MALICIOUS

PDF

74.6 KB Created: 2021-09-09 12:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: d637c81337e3a65eedd15c3874a48864 SHA-1: 67e50286a31609444d3b97aef721707237a513e9 SHA-256: 07d700e7eb67f6efa2a62eb8a9a7ac05a7fcf9bc02cee283e438c382c1803265
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://analhospital.net/file/files/6212704542.pdf In PDF document text
    • http://osayit.com/images/file/zoruvewinogozadazoname.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/lulexudoxisafamoxi.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/29220069094.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/kajavijuvovi.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/97014283726.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/berexinawesozek.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139abcc15784---21140285390.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/11137985996.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/mipaladavitafuw.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/9750047372.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/76e6f09627cc73984fe5f1bebd9888a5/32730997368.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/10388355500.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c123179f0---29173234036.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/nunubekide.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/71309262855.pdfIn PDF document text
    • https://bedandbreakfastholten.nl/userfiles/file/latemorajibedovepav.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/bumegusolawarofejufojo.pdfIn PDF document text
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/57800982111.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/ligidap.pdfIn PDF document text
    • https://proia.bg/userfiles/file/75235341325.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/f794f3a7a19e6de208e9f960f30eea23/97724468787.pdfIn PDF document text
    • http://art-ball.net/files/file/ralenudebixobuvolesagibiv.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/baxejevupozopobuvudiz.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/doviz.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/xiwuwudamawojuguta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=best+sports+firestick+appPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDA 10468 bytes
SHA-256: 50315e6204629f463d314d67cda7eacc002fb770ace1515357eeb53d53e4b438
font_01_sfnt_off0000d4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D8 18632 bytes
SHA-256: 2a3c47ab08ee550f73b969fdf29b43d215f11b3ffc8a2fc3933b61ab1c7e2a29
font_02_sfnt_off00010498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10498 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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