Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7023c8efd5d597…

MALICIOUS

PDF

92.8 KB Created: 2021-06-26 04:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 49b3c61e617065bcfa285767e61e8ad7 SHA-1: acd0726901a40070cf8528ab7db2e2e75fa7c5b6 SHA-256: 4b7023c8efd5d597ff5fc130db9283d89a1260aa43e0476b2c0feb4eadd636bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware distribution campaigns. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to exploit user interaction via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://wastran.ru/uplcv?utm_term=is+eating+honey+bad+for+you PDF link annotation
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c0bec6bf1c1fe97aada749b7af32ed90/31941372875.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf04487a1a1---56233104661.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/4c4791166967371193d87b32882db45d/nafubaromadudesar.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160839ab9b30e4---dokomakuvudabibumori.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/lekebiputelezufer.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/8b61b54c6486832f238cba558506b4ac/38494079068.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071a68cecdec---bexobazom.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/nugajekiwovire.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/s9bu9dmukeinlq2agjgo9q7ecj/bibikaze.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/a711d07a91847af045ce33bf9a90e97f/22966806889.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7645d80c40---63909125226.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1eab822f4---66030775610.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5544fe99b38325d5b0f3bf0c8ac42f66/64358343689.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc34161f1b---zuvekinowebig.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c04f7c1a516---vixixurune.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/remaxapu.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/61964518088.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/xefekeduka.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/4155971867.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/444f0c11997aca9392365b3075ad5f9d/62323805223.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160986741d71a1---vorizikis.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_off00010746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10746 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5D 10892 bytes
SHA-256: feac9aaa9588dba2daa5fe92bb75a379911a225cc26468ea816723fd5ea2edd9
font_02_sfnt_off00013851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13851 17096 bytes
SHA-256: 08a94c6e50f974c9dbf8340fbbe49338f5660faacf0a857daf622e0192d0ab78

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