Malicious PDF — malware analysis report

Static analysis result for SHA-256 24115b81694b1797…

MALICIOUS

PDF

93.6 KB Created: 2021-06-25 22:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1f365fedbfe530bfd44ea86324c4f272 SHA-1: d283bcf637285340ca9d331546c862326e274a53 SHA-256: 24115b81694b1797c706b14e76feff77680365570fd66029f108c9e8ce7e7712
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics as malicious, including a link farm pointing to compromised WordPress upload storage. The presence of numerous unknown URLs suggests a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a likely attempt to lure users to external malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/60070f0855498411a09fa0ff211ac04c/50644345972.pdf In PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/59335845201.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/0022fc4d64849d23259449a98080175e/woseniren.pdfIn PDF document text
    • http://umiyawoodworks.com/fckdb/userfiles/file/duzarovegeri.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/d26ea36a5a1f291507ade6d46f5846ec/96431497193.pdfIn PDF document text
    • https://unosms.us/userfiles/file/desilikunizi.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/64945638320.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5642aa6d44---10375141799.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/69257842344.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/49473830123.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/h518716qfhq0dnjsh0u4pngmmc/biwovidarixazuwebana.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098f26f135d0---3716337419.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/zipitiza.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46c875e959---60958619123.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e20bf6ef5f---66708092976.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/lejufobivagisudirekoxa.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/11256440885.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/mesided.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bea2a8d0f44---finonotosanapukuni.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/84513396697.pdfIn PDF document text
    • http://emannsltd.com/userfiles/zabedi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716640ca327---54330909847.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/f0ca8cc2e3da03e3ee08ada14152434f/73746266173.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=crna+nurse+meaningPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D26 10320 bytes
SHA-256: bb2a35b86d007e8b720824b5e1371d8a0161be72f6ae65557aab024e0e994c14
font_01_sfnt_off0001245e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C70 17200 bytes
SHA-256: a54882028206a953e21148c70bc9b54ad99a044e4d9463b76dd2df8e18425609

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