Malicious PDF — malware analysis report

Static analysis result for SHA-256 1322242bfe34533a…

MALICIOUS

PDF

78.0 KB Created: 2021-08-05 21:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fd14c3585bf1a867901f1dec0e2b110f SHA-1: 424fc8e787785d2eee3938453e984735d807723e SHA-256: 1322242bfe34533a44208bc0c1ecf4d0a89fa4041a23cd8c6db317d5b54787f9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and the presence of external URIs indicate it's likely used as a lure for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://medvor.ru/uplcv?utm_term=livro+constela%C3%A7%C3%B5es+familiares+o+reconhecimento+das+ordens+do+amor PDF link annotation
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/60t8o39p0efrgvjseipd5j7232/zosaxuzo.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/67940130903.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f501446e2d---benidesowixatamotegusax.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e69d2c811f4ef078e45f8baf6e0e5ea3/lamidixezijasutafan.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/71664804157.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607abe1f1a76d---volekidolon.pdfIn PDF document text
    • http://m4krichmond.org/clients/3/3b/3bf4c986be49c21931b3574e72fd8103/File/lifibisibamibomuvo.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/sezabun.pdfIn PDF document text
    • http://71mhsreunion.com/clients/f/fd/fd19d29f3ef40f7e1d0269d1df38e7d4/File/vatebesap.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/xerevevewulanurubekuwu.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/11514103756.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/gamenosutexexazumifegume.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/tosuzesikopejukalav.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/51405075271.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/rudurima.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c188d7b024---11614061443.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/67004080593.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a5d3ea57f---favetiximatonanarubakota.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a566cbd7f32---wixusubudalunupu.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac11d3ac331---55912592486.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/a9e857a65000813db7e4e5040785ab1c/wazitobevedijexaxaxavil.pdfIn PDF document text
    • http://beiks.info/public/file/telenuwobivakifal.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/fddba86e8c99565630f5f7aff555a0ce/61203139104.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b4b5e71bd---57501234285.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/bb9ea4588d6ef58be46b91ff7a5f95ce/32442728088.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/3f765b2dac1892619cfa9aba7001ec35/23506259645.pdfIn PDF document text
    • https://tigapilar.com/upload/files/84143432329.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE041 18348 bytes
SHA-256: cb881d007120354447e1a59acc4eb0c2be84615202937d3480129c76808488c2
font_02_sfnt_off00010d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D41 11188 bytes
SHA-256: 58c720019761be34c37e17abbe2b20abf8fa2771d6da5cbb9e9a002e96af476a

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