Malicious PDF — malware analysis report

Static analysis result for SHA-256 297b2c3ca72bb3c4…

MALICIOUS

PDF

144.2 KB Created: 2021-07-02 06:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fead7413a7eb0e78701543b5b625c4e3 SHA-1: 3e64b87aa62f4c124d79ba43b974e89c39dffde6 SHA-256: 297b2c3ca72bb3c459c340907f9232e8874780c06fae86090d6749982da35316
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised websites and other PDF files, indicative of a link farm designed to lure victims to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. The file's structure and URL patterns align with common tactics for distributing malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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 https://allytemp.ru/uplcv?utm_term=the+fountainhead+pdf+in+telugu+free+download PDF link annotation
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/64d95cdb8b98c47dc52d6e044d38f52d/ximeluvixo.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/i6ikh486cirumit5141bvuvie6/lawagebufonipifeb.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/10923066907.pdfIn PDF document text
    • http://m2mus.pro/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/jejabuluwikuxaler.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/tg93jdkiupka2bl559ujjga460/16676468517.pdfIn PDF document text
    • http://tano-cable.com/d/files/62027727072.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/fifokagobupida.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/28054830351.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/098875e23636e9047f038946473146b0/45257160150.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/24036992779.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f476be834c---danogerefaj.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/10556179238.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a50d9ec72447f3485cde90beb7c8e49e/zixisovozowaru.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/7ba0a9d133cc2e71aeb1e2b0841bf316/53408230605.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160853c8cddf2e---mamexonun.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/sazunumikobaxaw.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/91aeb6b0d1d281518a1becf2fabf128c/67078969872.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/33181601973.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71ca51398b---51982322697.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/c59ed0bc55e9af5bcb8ebaeb1ee6f5ff/78512011409.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/47255673663.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/63461826211.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/getesulefakasebujuzukap.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7A4 10760 bytes
SHA-256: a94e42c02d5ee717d651d29f9695dd3d183a6fcd11859eabc6b221e4e93de4ea
font_01_sfnt_off0001d021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D021 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E833 19784 bytes
SHA-256: ad3861ce1806ebe941a23db6f9a40e5768120685163d2b1502d92233b9209347
font_03_sfnt_off00021afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21AFD 16204 bytes
SHA-256: 22dbe61a7cdc5352a071fba1ccc9e2cb9c749832ff22254afd73b79c00569a21

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