Malicious PDF — malware analysis report

Static analysis result for SHA-256 be94146d99c03037…

MALICIOUS

PDF

76.9 KB Created: 2021-08-28 09:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2694101603fd85686d5482caf76e0ca5 SHA-1: f6ce11aebd57fdf7f064abd1a94dc94fe71beb16 SHA-256: be94146d99c03037b22ff4a0c00aa9ee89b4d73c23905568d82777b9774b8eb4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into phishing scams or download further malware. The presence of multiple external URIs and link farm indicators strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/530824099848c69fa9fcf534b1789cf5/66838581117.pdf In PDF document text
    • https://ghnservizi.com/file/vogol.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210626151646.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609a60bad7a53---simopadafiketivunutof.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/866166d73c4c963e01a2b2eaa2e3867b/mirezodugizufovibi.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/64779743741.pdfIn PDF document text
    • https://zzwgjx.com/d/files/83330257318.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/ridoxopasa.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/nupaf.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ed76eb6955822a5d88545b30b6f713fa/89907734735.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f33c3bddb7---nowupemid.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830fce536af---17716425625.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/dozemezomalamiputivedigel.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160879060d6b44---61291293719.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/32574471172.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/8ad539171552879ab86ca653297ba8c7/26839197434.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e55eb8b99fb---66869976024.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab11541e473---13350928749.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/3c80e6c057a886ed677200381b6a6a0c/20695868300.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/vujesewijadomur.pdfIn PDF document text
    • https://olterus.com/contents//files/nadikun.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/53712912993.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/8147280197.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/9492899810.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/difekesivalizixiwat.pdfIn PDF document text
    • http://pinxedien.net/upload/files/8388583945.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=altered+skin+integrityPDF 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_off0000c89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89F 17716 bytes
SHA-256: ca4d7e1c6f4a113d16a293b6bbfccacd330ba79f30351847954df22e384ac16e
font_01_sfnt_off0000f663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF663 10328 bytes
SHA-256: 67b9f3d11c9efcb7195338ac6b4c15b07aba6d0977c37f08a68b9247ff324d5f
font_02_sfnt_off00010d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1