Malicious PDF — malware analysis report

Static analysis result for SHA-256 168175f9ce527925…

MALICIOUS

PDF

160.9 KB Created: 2021-07-05 12:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6a4b717529fea298e466f7ad586ff1d7 SHA-1: 5b30852a693330698697b0080c88541562726e98 SHA-256: 168175f9ce52792549bb9d96ce8111d517144fe1276a11a8bf911dfb25cfdf16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to compromised WordPress installations and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

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://oniceh.ru/uplcv?utm_term=what+is+applied+research+in+sociology PDF link annotation
    • http://morard-mcf.fr/data/Files/37807995492.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/ngvlfdrmdcak4vd59gk69720p1/tejumiwesi.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/b848d709e869ba8133312eaa6d6a4e89/15567054085.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/bf83c9812177a082f710c54aa6b78f26/59369310889.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/19550827606.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/87191f2861a36aa09ef673ce06f9549c/ratigekilitaxo.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ce9ff0bd312---90944528258.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/848gup15p746k08phbvqtn3vrh/duxibuxoborizobamir.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c729575e02---87188002019.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/b7c4ea35bed5571dd6b4461a5b8c4e8a/kejipipekoxuso.pdfIn PDF document text
    • http://geotersrl.it/file/modopurofi.pdfIn PDF document text
    • https://juegosinflablesarizona.com/files/6806931835.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/qnc3d0spmcpfnd01k1ffavc5qp/rabugumuzewigasude.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd14df0a35---kavomurugabomavapigibe.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/59c4d82697068d1fb1315be8138c5d5b/61879940579.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/xirazidafave.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/84006304982.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c44b8b27a27---28656464742.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/d00fc2839b94298795d2d47d1ebb472b/27108640325.pdfIn PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/tusoxiwoz.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/23980708743.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8c0a29621---42727964376.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/sosalofotafalalopusab.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/01c288d6db68f8b6264443970044a0c0/xelafejuzidoxupifi.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_off000213e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x213E0 18448 bytes
SHA-256: 410018c042b084bf0dad10428af06ecc3238af4f2a8ff4b76806cb775db5ab0c
font_01_sfnt_off000244ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x244AD 10900 bytes
SHA-256: 0b763d05d9e1e126bc323540fbb8693c046d61aceac9129302b93b7f22afba8c
font_02_sfnt_off00025dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25DAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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