Malicious PDF — malware analysis report

Static analysis result for SHA-256 0699b618f425de4d…

MALICIOUS

PDF

72.7 KB Created: 2021-09-07 17:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8cbcc178779592063a331179bf4b95b8 SHA-1: e9209d85f4459d32679f5bbd323a72bd94f7dce8 SHA-256: 0699b618f425de4dbbd731171543cf6b9a22e7c5bef9648cca049dd0ef0d2c39
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The file contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs indicate a likely intent to exploit users through deceptive links, potentially leading to credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://cructi.ru/uplcv?utm_term=verb+and+helping+verbs+worksheets PDF link annotation
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a2cd9e9e1625dbdb58173cc6f8b6be6f/lipomumitiga.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/nopupejabolejogawixe.pdfIn PDF document text
    • http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/bokejunuz.pdfIn PDF document text
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/71421235248.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb839b5f9f5---22890287038.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/dizomev.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afe070ef16b---tugap.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/2348781673.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612a566670ab2---munodikuxibigixavadokiwa.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/211da5b9c04e8557947cadf04c0644c3/17454465562.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/13169340483.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608925e2ee394---51791059312.pdfIn PDF document text
    • https://nada70.org/userfiles/file/jebujixojimojimo.pdfIn PDF document text
    • http://armanetti.com/images/mixuvukafudofexixifeto.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/328pjeu6ans1cebivv61sl8ss7/79548173531.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6db325398---97938857904.pdfIn PDF document text
    • https://ahha.az/userfiles/file/botopon.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/75988984149.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9cdc66ebb9---kamotubotulezebekir.pdfIn PDF document text
    • http://xn--80aafkatcapceshpicpg3h.xn--p1ai/pict/file/29118308940.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/89475732875.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/30475dd546f94a6d8fa0f4579f588c3f/fejatojup.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/69793659500.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bd525c007---wofadakewovef.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/75668173839.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_off0000bca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA2 11024 bytes
SHA-256: 34990e66a27c183e02618074fbe8eea08d8ca0e41f000e53fe0bc0f972032927
font_01_sfnt_off0000d5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C8 15592 bytes
SHA-256: c485309ce7c59e6df29bf78f4891fba8e7b8a59bac79f7d5f521688d3ff5958f
font_02_sfnt_off0000fcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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