Malicious PDF — malware analysis report

Static analysis result for SHA-256 017f74f63e226149…

MALICIOUS

PDF

81.8 KB Created: 2021-09-12 04:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e7347b23b8bc107a32d4afc29a893e2b SHA-1: b71468dedb57d94c11b1878df3fa89c8a236da76 SHA-256: 017f74f63e226149703b8f8c004f0c792a67060f6cb808d73e0ed904f658ff1f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript, which is often used to execute malicious actions or redirect users. The document also functions as a link farm, pointing to multiple external URLs, some of which are hosted on compromised WordPress sites or disposable domains, increasing the likelihood of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://panziofabian.hu/fck_kepek/gipavewagadizubiv.pdf In PDF document text
    • http://kbchina.de/upload/wesokomakitozavuzep.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/51262570778.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/bivulilafoburelinon.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d18541e719---37391335220.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/vasovugutofumarebugun.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/33444818504.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613c02b6ce126---pesotavobuzusuwenim.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/16263959155.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/32393618726.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff4c9b97a7---36399543792.pdfIn PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/15820929420.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/19557832628.pdfIn PDF document text
    • https://777mto.info/contents/files/tewiwowujukibujezokurog.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/27847252742.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kamixirowekafiti.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/37582606590.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/80640099547.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/6a54c8cdf3694755fa4903a6519a5000/22016982960.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/tufexepex.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/33722343457.pdfIn PDF document text
    • https://kawanmto.com/contents/files/bosifagexu.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138873525ba7---96073674191.pdfIn PDF document text
    • http://abnicum.com/files/file/savubemogukiditupa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=ncea+level+1+acids+and+basesPDF 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_off0000d95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF174 10280 bytes
SHA-256: 9a7f514259228b48355752d656f09db1e7bf1e6031e3e87667918194fef8e108
font_02_sfnt_off000108b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B5 18612 bytes
SHA-256: 49d4c815b138333eb88d0835c3833df8fc4071f186dc07b308c7f6f4aaa2e24e

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