Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec30eb79438d1077…

MALICIOUS

PDF

111.1 KB Created: 2021-08-20 10:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 986ee369e6565099be2b38f94789b1e8 SHA-1: ca10252bfdfb9593fc1ecaa24b24f94b36effec1 SHA-256: ec30eb79438d1077a802308fd7ae2a1310eb973a7d04a42cb1a6830735af920c
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed numerous URLs embedded within the PDF, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4881

Heuristics 5

  • 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
  • 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://crysiq.ru/uplcv?utm_term=khutbah+idul+fitri+2020+pdf+nu PDF link annotation
    • http://praconsulgroup.ru/pict/file/tuwodililatixogegabe.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/8e9410e0005d498afc39513ff3309ba5/merurinodurivasejijoteli.pdfIn PDF document text
    • http://hillhouseclassof1961.com/clients/c/c9/c9b049383fb65e98d0a4dcab6c176392/File/99393137378.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/wilodateresak.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/bobipi.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/70595561892.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/94708637866.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/14562367871.pdfIn PDF document text
    • http://hanleyresources.com/images/rawigasoxiliv.pdfIn PDF document text
    • http://dralituncer.com/userfiles/file/33902581581.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/39947133369.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a20ee51b307---53546775942.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac124be703d---49403262383.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160ae004f16f65---3239453584.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/8e27963d93cee0f598ae6d47cf232cab/kigaxuxem.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/90616977544.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/30011464624.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/notetebanubegi.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/56774866935.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/norivezubeb.pdfIn PDF document text
    • http://bigpictureresources.com/userfilesbigpicture/file/mesosuwinugojifuroviz.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/c71d042ad828efb775a50b1761ac81b4/71656729825.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/siguvi.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/89822951374.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/gukuwelerawogiponedibe.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b893ec4500d---xegedisumumikiwixazov.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abad8499d2d---kozejexafefilupipamopub.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00012e8c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12E8C 30816 bytes
SHA-256: d94a40042f15507b1f5d7f2ca1923adddedaaf42e2577eccfce532b1f8277a09
font_01_sfnt_off00016518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16518 10648 bytes
SHA-256: 8a3d03e12424e6ae11584e8fde1803498cc712aaa376b52255538f3e164ee9e3
font_02_sfnt_off00017d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001952d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1952D 16604 bytes
SHA-256: 69b7b302086da4ef06e8bdc2fa469c663821b0681640bf1d132f3335d92ef871

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