Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1ad64ea01616bb…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 22:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c317413b2a4b22157d9597bd6b3f2ea7 SHA-1: 63c0b3fedadd8f33b6cac31dfc5e426366a43a96 SHA-256: dd1ad64ea01616bb2084bbfba524a6c473369efe134242aee977c467719c620c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links, further suggesting malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://jouezadomicile.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/68147898373.pdf In PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/336ae0f30f7830ad9703bbc5cb6d5add/37547874944.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/57144089333.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16078d56263465---56706055313.pdfIn PDF document text
    • http://georgeandmaryjones.com/clients/f/ff/ff66b05efb8f16ea353d8e6908bb1429/File/6937205567.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/zupalubafajelufo.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/95524604947.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/semafowulabasa.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c6593be36b2---riwigonoxomok.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4f8ed6b58---48405980177.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/duzelasimap.pdfIn PDF document text
    • https://edarky.net/data/file/15085757978.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3c9a8b7ad---8137666149.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d72f95008b---51364815295.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d7fb090e898cef143864ba143162d085/89282150420.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/10549600770.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/hc97ehvbneogvmcek7797iqgm2/bapewusid.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/43942546171.pdfIn PDF document text
    • http://short-story.ru/upload/file/fuvefodilupuw.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///99633942561.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/sabeh8h0iduo5fvrbe1uq5qeq1/xedef.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/9216015925.pdfIn PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/97287884759.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+first+solar+eclipsePDF 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_off0000e8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A1 10436 bytes
SHA-256: 07010cc42c9c88264ef4194ce5de96995c119f257a7e3d195bff6213a6d5d4b1
font_01_sfnt_off0001007a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001188c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188C 18000 bytes
SHA-256: b361aee8b490ceb5fd6abb53b65ac89fab7b783f3eeafa92c51fa56038f8aecc

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