Malicious PDF — malware analysis report

Static analysis result for SHA-256 0983983002a2e6e1…

MALICIOUS

PDF

82.4 KB Created: 2021-09-16 17:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 932af9f7a5f0971b1fd65d7781d71b69 SHA-1: 5ca9620b0c49e421b2f05e04d111cc2c89141194 SHA-256: 0983983002a2e6e1bd0fabfa7c491dff384a34698ed8db536f5a208aea28bd78
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely to redirect users to malicious content or phishing sites. The embedded URLs, despite some being marked benign, contribute to the overall suspicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gift-founder.com/archive/upload/files/47543134505.pdf In PDF document text
    • http://veganogle.es/uploads/ckfinder/files/7057344650.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/juroxe.pdfIn PDF document text
    • https://ibextrail.com/editor-images/35843889716.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/dijusotir.pdfIn PDF document text
    • http://lpxs168.com/filespath/files/20210902163644.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16130af5a24f86---feponubapato.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/2624989587.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/84539164394.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfc8e51e14---8322631640.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/rewiwopita.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/73376502677.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/pirubejanusuzoxepovuvod.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/33917378831.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/20855774583.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/50930919798.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/wuzoxesoxalokofesorolor.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/fopupafati.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3bf521c17b828cb086ba7e164972bc39/magejusowijiwerotukit.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/wefaxopig.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/40148246434.pdfIn PDF document text
    • http://phongkhamthienhoa.vn/images/files/lugemovowaximuvadav.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/kadavevefojixuk.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/87084240440.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/49820465159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=hack+wifi+hidden+ssidPDF 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_off0000dc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF426 10380 bytes
SHA-256: 1ad53750edcab5e4a042897b9df6607d3f2919df767af9f9a79be99cd4e93822
font_02_sfnt_off00010b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B96 18588 bytes
SHA-256: 72af9dd10c3c65482e6dbc5fb7971288bb9d2cc48813eb524e6fbd4f0236f1e3