Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ad7582573a8a3b…

MALICIOUS

PDF

89.0 KB Created: 2021-08-23 16:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 3fe0fcddc93db77a92200fc93dcebb37 SHA-1: 0527e431dfa162b2c9a36b21e1f1018a523e9431 SHA-256: 37ad7582573a8a3b245d9cda861ec84a094881557cc18be41f84bd8c5a39b0a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to compromised websites and disposable hosting, characteristic of a link farm used to distribute phishing content or malware. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a redirection mechanism, likely involving JavaScript or other client-side exploits, to achieve its malicious objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/2a52872edd41c4cc74485e15020a788a/taximoxogegilalenura.pdf In PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/39212700458.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c3da96e7d---ruvuketekeletubedave.pdfIn PDF document text
    • http://bridgeonlaw.com/filespath/files/20210819041905.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/f0324b56655e2548e8fb7fe381244af3/muxexitidowaxejeviwu.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e83e63f24b---63455259029.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/40774236759.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/34320472173.pdfIn PDF document text
    • http://ozona.pt/wysiwygfiles/file/69298439528.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/viwarenimupedog.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/3729148671bae289650c8e45164c9631.pdfIn PDF document text
    • https://cryptobasics.biz/uploads/files/belasa.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608035388151c---zereramodifakezekaduwaka.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/8a7048a3be2ae4c07c321749436a878d/vujupuxuken.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/7578534410.pdfIn PDF document text
    • https://safehouseservices.in/fckfiles/file/jukujo.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/53511946364.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/ganujunopetixovum.pdfIn PDF document text
    • https://armenia4d.com/contents//files/66344114086.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/knv71ufl3l5vae0k8pvm8rfqbu/wividapuxuzapazato.pdfIn PDF document text
    • https://seerupit.dk/assens/file/96602674290.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/8lr8u87gl4caep4192pnn9m8i6/11228444292.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202107280933057280.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/7cffcc4c9dc141553bc8dcdaee0b8589/36590216674.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/tulolifozojajabutober.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=wireless+communication+lab+experimentsPDF 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_off0000f7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE1 10872 bytes
SHA-256: d424a88d6e09ef6ffa5f3c24353e7e93b1cf9f06b53a79b3b07b78c4dd41b43b
font_02_sfnt_off000128d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D5 17196 bytes
SHA-256: 0f2b22239b2c537ad8134ba2e11013021059a84f9b22aa6423cc04f679b847b0

Open this report in the interactive analyzer, or submit your own file for analysis.