Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3aa943317be4000…

MALICIOUS

PDF

92.3 KB Created: 2021-07-23 14:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 53e9e663d0e9acd3fb8a314d2b8b79a1 SHA-1: cf2446c75344f06f0a38185ee0e12a162425ccb2 SHA-256: a3aa943317be40001875232b538f9452d95d2988285b3082c0cd79091b28d6cb
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of numerous links to potentially compromised CMS upload directories suggests an attempt to host malicious content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609135541369d---8186058409.pdf In PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3607c1c7e---vavuvifadebima.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/88893309555.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/serutoguvubemimowewu.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/89b63e275018ad132df8eab739651aac/rajasenazepofadevukomes.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/67459578387.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/lekovogelepup.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/guzamatezifamitaduket.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/51968f9d51bde7d384ec606e3fb0c346/madisef.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/94084051842.pdfIn PDF document text
    • https://gomaihoa.net/upload/files/binuwitutodapixiroduko.pdfIn PDF document text
    • http://anma.pl/anma_edytor/file/11553673148.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/wijevukazujezubajax.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/lomerirun.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/49549305630.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/a6213ef4d0baf10f39154406897a25fb/9038108587.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608749f8b7e58---newojepamiwi.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/ffa9b37c427110f83dbd293ae7a92ed9/56248673974.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/71599229027.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086636dd3152---zipotoziwisuxurajiveluxar.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160cf3e6785f12---duboximuporeveferul.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/9ae6269ea42b1a5edb91b9e4a783392b/dodanudojo.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dptrqrm696a068t1ksrj79tr2/72050552614.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092c64bf048e---53536342451.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=agendas+2020+para+imprimir+pdfPDF 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_off000100a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000118b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B8 10800 bytes
SHA-256: dcb517c87408b9ff0bd87f073135ae36246027f9e20e4de01a36eeb623289a73
font_02_sfnt_off00013173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13173 19544 bytes
SHA-256: 310a762ded82d9d4ca23f2e1ae46be633b007fac22df7f8e60ede7cee2179821

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