Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac01c439194060e…

MALICIOUS

PDF

73.5 KB Created: 2021-09-28 04:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bdeff35a8bcc1c28ca775e88284e316a SHA-1: 37dc5008ec892381c5096425ae7841e614ea1f14 SHA-256: fac01c439194060ed37e1e487d03c2e91ad8be12666529b71546c5117f3c553a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It functions as a link farm, directing users to numerous external websites, some hosted on compromised CMS platforms. The embedded URL 'https://archism.ru/uplcv?utm_term=top+free+boxing+streaming+sites' is a primary indicator of the phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://archism.ru/uplcv?utm_term=top+free+boxing+streaming+sites PDF link annotation
    • http://svatba-emi.com/uploads/pages/files/sadexapexekigog.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/0f5dfde95532c0bfa57dbd03c91d5a94/10136816596.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/463ede0bdc9b7833bd54ab80ff0d0042/sedojelufet.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/kemodo.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/gowesonopaxegobalik.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/91691570434.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/bukababafawizawikuwopu.pdfIn PDF document text
    • http://invismortgagebroker.com/images/file/dejutedo.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/80886756295.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/70873409190.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/88944210496.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/39285400464.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/dixifafazerureli.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/84302584350.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/1152612432.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/35474987275.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a9d5170c1---fexurewinalixetepebumaf.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/xoruniduwokinolanep.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/95k0onfl56lsbcmmun9kh8amcc/bamerinivomumut.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/kironi.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/69710813774.pdfIn PDF document text
    • http://gkz-crimea.ru/userfiles/file/64888591838.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385cd81e92e---zurite.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_off0000b84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB84C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD063 10860 bytes
SHA-256: 3905a1a3740276fae94961526d9dea01a3d06c25006eee3f853df0761d5d84d7
font_02_sfnt_off0000e946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE946 18340 bytes
SHA-256: 114942d65c09c2d92db703b8cd93d8b7bec370265a38735698345b192da0a62b

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