Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e9bd24101ad77b…

MALICIOUS

PDF

93.4 KB Created: 2021-07-04 03:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f0dd1b2169f89277cac9f66d71e2851a SHA-1: d09b61d98f3f8e75bf9a13f25606a04d66a45f3e SHA-256: 92e9bd24101ad77b23a385fc4a672abae4ba120ee62e2430147895c4cba0c65c
164 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 a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious content. The presence of numerous unknown URLs indicates a broad distribution effort, likely for phishing or to serve further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/fee9f15d7fe9fd4c7f07935f2c310a17/zumiti.pdf In PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/8316ddbe851c438f4af2978557ab33ed/27903516629.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/61545484140.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3ef06de65---94826303621.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/793ef05b4614d43064eacbf0d8a224d9/28553369412.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/43qtk4u1h1791d3aicrbbn23o6/6856401422.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/ferozun.pdfIn PDF document text
    • https://inncredel.com/uploads/28274654045.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7812745e3---kunolarugepuvupolul.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/digukabafepodifikakoj.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/lt9s6m7v7femsl67gopftokncm/60686757914.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/db6b9561f60fdd47e20eca115738e9b0/zavus.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/frus22rfsdpt2a8jep4dib2a32/mupiworapumesejanivofabis.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/60985286638.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/85948219958.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759613898ee---15589575797.pdfIn PDF document text
    • http://uctodane.cz/UserFiles/File/10269596088.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4df71ced4---logejeko.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/50140685898.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160734223019fd---gevimunomabamitusugizoxuw.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/28520355670.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/f1ad3d5afb827f19bd127866bff91b78/1463574522.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+likely+is+precum+to+get+someone+pregnantPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF57 11100 bytes
SHA-256: 1cbca0027b6f76894837bf4777e2595adb964150a5493672d1d4c79a59bf7fc7
font_01_sfnt_off0001094a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094A 18172 bytes
SHA-256: 4faed5c08ce7fc043d061eb46372c9565977fc24e9bb37d340ad5b3e87df4e6e
font_02_sfnt_off0001399e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1399E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000151af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151AF 16396 bytes
SHA-256: 0d5ffd35431de3a46edebb3e7d04db42186100d4a60b404ad8ca180934dad6cb

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