Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1f8b1f4ea5047d…

MALICIOUS

PDF

99.0 KB Created: 2021-08-18 14:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8c40591e28dfe2268e8cff0a21f8eb08 SHA-1: 180abff2147779fbdc82bf57ce11c690ae874708 SHA-256: 6b1f8b1f4ea5047d1cb90bf3b972a3dddb758064d334e351db13b8fbd17a8851
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised WordPress upload storage, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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://floraplant.gr/FCKeditor/userimages/file/21815715807.pdf In PDF document text
    • http://mrybalko.ru/files/goxasasajaniti.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/41157033274.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/nujetowem.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1552143235---50690945016.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/nukakebo.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a82b1c2af---3659915659.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/0278e16082b2db2156dc131741450c8b/logelafofer.pdfIn PDF document text
    • https://plasy.com/uploads/file/liligozewi.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/sikazeroj.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/e5c754cace4eb557bdb68c7e9d7bb48c/39187246615.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a71a5969c---789757601.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160743b99ac372---tevofo.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/guxupakuwawuda.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/1tfj7cnnffm02f3udes3bgn5r3/kusixupazuzanepi.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/ed71683c181a6975fa1696e4979a17b0/koxetaduzaverivujikazok.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/80024106915.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/70418440531.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/hsph00l4amoeevbri2f4pvbtpf/45887782393.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/5399687624.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0c5c5a67b---98246856610.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/38997354889.pdfIn PDF document text
    • http://ues-rb.ru/themes/ues-rb.ru/files/72819780216.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/54498056334.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/tebozanejavujunujefugimik.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160881b6cf13c5---93358523464.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=is+the+real+act+prep+guide+accuratePDF 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_off00011dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC1 17444 bytes
SHA-256: 8140a165fccb9e0622eb208394af8410d2ac5642a967ecc43e8d84cdf03317b3
font_01_sfnt_off00014ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE3 10620 bytes
SHA-256: 5c14f92dc9fd7dfb1500f48011fc6ddba2a478da42b136ad6da5611beb51b03d
font_02_sfnt_off00016319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16319 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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