Malicious PDF — malware analysis report

Static analysis result for SHA-256 18144802b7807808…

MALICIOUS

PDF

88.1 KB Created: 2021-09-01 19:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: fc05b74cf4d615a4a2ae88ab2f1d2944 SHA-1: d62b68f0f27200bd1af79394261950f641d3f5d1 SHA-256: 18144802b7807808378a5df304ef6e87ede4fd1c064de3ad695ea0d63666523f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It functions as a link farm, directing users to numerous external URLs, with several hosted on compromised WordPress upload directories. The primary attack pattern involves luring users to potentially malicious content through a collection of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://technocom.pl/editor/file/52045725833.pdf In PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/7c375fb29214e191d99722d6bb6635ca/kabat.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087040e9553b---wekil.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/euvrjapbh1sc7qiclae4im9i65/xedeposivofelaweturupemo.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/8093687159.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a47ca30ba6---xeleza.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/jamejipomikuvakig.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fe104bc42---75283481044.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/ed975a31c5a541fb879cce21a0694ca8/jaxatoma.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/cb652d31dab1060bd142d345407fbe25/sugidudefasizi.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/3q3gldg5b3hgaclhejfdoqo5pf/wovekaxedabijulodanewip.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c6e1824a3---94869929994.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/gagabewijizu.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/kozidenukasenupazolomor.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d337246fe---51676443463.pdfIn PDF document text
    • http://byecook.com/ckupload/files/vigosuxapepe.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/xonanaxebo.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/nerabilubagikesun.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/4a3183f5c14c1b730d2dec0254d04270/rifiwaxapidale.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/lr52460v51lngj45voda7agi53/80202599795.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b96a7eecede7b023c64837ab47490926/77071988928.pdfIn PDF document text
    • https://digicpictures.com/downloads/nujotepidutakatewupe.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/sojifozikukukas.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ba6kibnuvboqrvvafg0su9soef/vivane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+humanist+perspectivePDF 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_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 10604 bytes
SHA-256: 18d9ef1d786ae59847e7c725a44fcc3677e8fce32ee5cb81ced8ff2be23e0bba
font_01_sfnt_off00010ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F8 18684 bytes
SHA-256: 42c8eb765649dd7ca797b857ce30f37be2dac9be58859920fab7acb1d77856f7

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