Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc6b3fda2838389…

MALICIOUS

PDF

75.0 KB Created: 2021-09-12 12:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bb43bfdc4104fa10649a8d79a3a451e2 SHA-1: d5a2727ed393b356e042a1abe0f523b79f7944e4 SHA-256: 7fc6b3fda283838974080570016c80753d2ce0312e6dee033a9626828e2b6f48
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many of which point to disposable hosting or compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://manenshop.com/upload/files/futizulibedaxipax.pdf In PDF document text
    • http://373113.linker.tw/files/70886897064.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/pezuzowiw.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/deboxuzozagifisib.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325fdbbf3af---sinogupixofome.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/sekubigisonijefaruwen.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/16017659902.pdfIn PDF document text
    • http://chamdure.com/DATA/files/sunidanibinid.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/57781217477.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/13682241792.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/nizigot.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9090ce1354342445bc303db92ed850f6/38685450524.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/sawapezebiwugev.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/33120097084.pdfIn PDF document text
    • https://pabxlg.com/userfiles/file/72638117796.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/fizetigexadalubef.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/xoziwageb.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/baxovimederir.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/fetodaje.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d761535e5e---82415043678.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/fobigiwubejikilit.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/q4487635jjbntdf40ed5ik3sdr/zesusaxilizurimogawa.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f70895b81---78545125054.pdfIn PDF document text
    • https://geloracinta.com/contents/files/xovomavoloranixuzigap.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c49002ad5---8053031941.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=best+time+pass+games+android+2020PDF 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_off0000bfe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE6 17524 bytes
SHA-256: f50f00cbac9c95db082b7e4d6d5b6e603ce7f1022452fa5bb5013ff1103709f3
font_01_sfnt_off0000ece5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE5 10984 bytes
SHA-256: 18cd4d73f6ef6602665277510f002069c8ec203a585b7fc8c111c11925c294cb
font_02_sfnt_off00010639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10639 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1