Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ed3fc2754a1d52…

MALICIOUS

PDF

72.1 KB Created: 2021-09-10 14:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 04a4195276dda0cb98b9e8cbcfd12fc5 SHA-1: a95134aab206ff5e58f9f8641ce08887e6b59ced SHA-256: 94ed3fc2754a1d529d935a0931ec3495ba11daf1c351ae65fcc3d28c939b6bfa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://kolbandibileklik.com/resimler/files/98520249351.pdf In PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/gamaza.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/57513934960.pdfIn PDF document text
    • https://saglamahsapkutu.com/img/editor/image/file/75973574364.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/mejezagesod.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161350984301ab---makajipoxole.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/zemotitenelatosa.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210903_43E4063DBDDAD7C4.pdfIn PDF document text
    • https://fengshan-zhennangong.org/upload/ckfinder/files/kugenumovokuvobubafudeso.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/35617709909.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/d71d7033673926c5a03eb9d3d8e433f1/42806392809.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/46711770344.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/nexunez.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8ef760ae58d432c23f58fa1f9d2d8500/janawipebuvobibagutiboke.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/99544112156.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/56835810666.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/jedevana.pdfIn PDF document text
    • http://jutaek.humenia.com/upload/userfiles/2021/09/files/210905040045.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/161330442a0fd4---zibudejulamaz.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/2273144282.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/gapawo.pdfIn PDF document text
    • http://faradbox.pl/files/file/60291723817.pdfIn PDF document text
    • https://ego-sofa.tw/uploads/files/202109041117413214.pdfIn PDF document text
    • http://umbabox.com/userfiles/file/datejadofobobir.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/10318579735.pdfIn PDF document text
    • https://redac.ch/upload/dunerutode.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=garena+free+fire+game+apkPDF 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_off0000ba66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA66 10400 bytes
SHA-256: 5315d9bc685c35f87766b02a9905e00cee0f8f99f6edc5d355988798d1cb51c7
font_01_sfnt_off0000d1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E1 15992 bytes
SHA-256: fdde22e0a1a6461d7e57b684ca1bdc60c195b70deda86d86542d03c79c4a2b7a
font_02_sfnt_off0000fa60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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