Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6b867830155be8…

MALICIOUS

PDF

70.8 KB Created: 2021-09-26 10:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 20a5376d62eac8b17a683cd697fb94b9 SHA-1: c01081d5ce3196ee49c7b53fd27230bb4021fa4d SHA-256: db6b867830155be8105427ccdd5d3af1c7046617fd57e3f1c7d7b79bfcbc524b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://stickerbarcode.com/file_media/file_image/file/xasabupomakejeziruvev.pdf In PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/mapukexisizajujuf.pdfIn PDF document text
    • http://shahgrp.com/uploads/20510909106.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/99000144722.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/30481992233.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/filoniwilagefajavagol.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/3a15499396f6106ce6860d8681c337a1/gipunafopope.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613be0518b2b9---94631506504.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/mivexunemigejegad.pdfIn PDF document text
    • http://melvin.cz/data/gijanotabakaximi.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/dexotesof.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/10534857998.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/56463744992.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/644f7b7d8dc52a960dfe7e2e8df9ff13/52129761087.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/5498203593.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/mebof.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/84993996391.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16134ce4a98d35---mupuzofixewosasukab.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/45c0b78e3a25a188f35e22bde2d5141b/56230877618.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/35721016674.pdfIn PDF document text
    • https://ceccarmaramures.ro/userfiles/file/dofulofarid.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/dudetozavadivozawe.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/tujuganeruxizus.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/debewizadimonapopipa.pdfIn PDF document text
    • http://koala-al.com/d/files/dukazugiliveriwujagiribu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=download+dls+2020+hack+apkPDF link annotation
    • https://easyown.ddproperty.com/datas/files/govagafigerekuli.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CE 10612 bytes
SHA-256: e8b75ef3cfdf91d0c01745a2bc8d3fddff5f90bb9c23eb6e0546bdc563d1ba74
font_01_sfnt_off0000ce1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 15532 bytes
SHA-256: d7c04daa4f64f0890101bcd1de820f910f7225bf467b06faf841b98ad7153629

Open this report in the interactive analyzer, or submit your own file for analysis.