Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aaed0ea360e3cc3…

MALICIOUS

PDF

82.6 KB Created: 2021-09-05 16:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 84b8af671f602ba2616ee07496db1276 SHA-1: 6fa086306cb6b5916ed829e47bb8c4fdfbc55e73 SHA-256: 7aaed0ea360e3cc361d00b7c374c99102761b34cfe73edae10be831f910d8f2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://immopolignano.lu/images/37728839280.pdf In PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/ca9699dc1a0b629416b2319bf0dec60b/mizanuvodapoladed.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8b222f718---tepusazu.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607816329eab4---69805546058.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/mofan.pdfIn PDF document text
    • http://brukbet.com/user_images/file/85427094720.pdfIn PDF document text
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/61765303895.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/0v2ea9ehm5k0e54fnddvga10t3/52625766861.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/98626417412.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/pizegizen.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/roledigov.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/8pampo07k002pd37ttkgr8rac0/23901298706.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/wojajekajotinelibe.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/1efdpprmv017rs02rqq7bo049v/paboxanafedawete.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/12293234193.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/50a08c9cb2717919f206169c541b1708/pefafunomadizu.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/semevg8ptcib3v02klmi8rpdbi/desuzeboserefefiraf.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/71078139964.pdfIn PDF document text
    • http://darstin.com/userfiles/files/xowajomaruzubi.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/6e2eb72e2cdd798bba10aa8deb78a3c0/zipazafibokobusanilenowu.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/b62e861a6ade124de0810edf00d00e37/reselizamixilita.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/63778252265.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=number+bonds+to+20+worksheets+freePDF 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_off0000de7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7C 17604 bytes
SHA-256: 5522edc29bef9506460e7571766950aa9c86fa1c954ba0c068091a2da4e55b8e
font_01_sfnt_off00010b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B99 10956 bytes
SHA-256: bf05aebd95dbd7e584cadbda04faced93fa2680eec4a0f23f820995585a55e69
font_02_sfnt_off000124ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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