Malicious PDF — malware analysis report

Static analysis result for SHA-256 45529da2c15815be…

MALICIOUS

PDF

87.9 KB Created: 2021-09-07 00:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d1c75f1a0baae42521cad9c5cd7db373 SHA-1: 98ddee7818bad44c2930414b8c4a1240ed9ddf29 SHA-256: 45529da2c15815be0e3e94ae8457dcf8b8ac888f7b9b6824a3391a34f82f61c5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised or disposable domains, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL distribution are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://zabradli-znerezu.cz/userfiles/file/30174462523.pdf In PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3cd2598a---pidifebitezedobipevu.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/30908426116.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/6328287786.pdfIn PDF document text
    • http://siembra.me/uploads/files/fefaluv.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/vefokobozazadawexejo.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ck4ba3tn7o1suc08789e16iqi0/wudonel.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/babitexemofoxuw.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/betewaronolemupajij.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607246df25d88---96380741535.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612707efcc7d9---jotesotebur.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/27139339893.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/84909472009.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/71035950516.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/regamumupolitifaj.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/jexekimebexotubefi.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc26909201---xutisolodetibidiwevav.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/31840484933.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/69010334908.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/fefibokupizafalisabop.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/gehd0vksa7toefugi6rsp1pdl5/fanigixudavirojelajal.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/fokaxawekedirome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=indefinite+integral+solved+problems+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_off0000f0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 18472 bytes
SHA-256: 3385b3848aefb40833cb59ecf3777c99d942a8c98fcb0ea1f3bb2f90190981a6
font_01_sfnt_off000120d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D6 10996 bytes
SHA-256: b92868cc7b5a41130b095c6c38042650bb3ec558e076206571597423707d63b9
font_02_sfnt_off000139f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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