Malicious PDF — malware analysis report

Static analysis result for SHA-256 341a7e0bbd908d60…

MALICIOUS

PDF

56.7 KB Created: 2021-09-03 08:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 143abb98849ac2f1981cd5487d3cfa65 SHA-1: 75587a5ace2f5a7e0029497de111034d0b76489e SHA-256: 341a7e0bbd908d60df611682502170fef3cdb704481f34ea670472af32313092
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to external sites, many hosted on compromised WordPress installations or disposable domains. The primary purpose appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7171

Heuristics 5

  • 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
  • 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://pixomot.ru/uplcv?utm_term=clasificacion+de+los+hipoglucemiantes+orales.+pdf PDF link annotation
    • http://cpbnatation.fr/fckeditor/userfiles/file/rokuvesifexefosod.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/00433a62a558dac78715d17340cd2797/67317666854.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b31ee31a7---41196340111.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/ribujepop.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/c4614d938d79367eb1f19c75cb75db0f/71750953573.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c512d59a4d---14407589612.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16d425913d---fewufuzeregukewomezabetar.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/e85d593dcd4e8e12c6c4479f16b52f27/jokogudunamebewuneza.pdfIn PDF document text
    • http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/89781834939.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/vuxum.pdfIn PDF document text
    • http://garderoba.sk/images/_file/nasepobegojedi.pdfIn PDF document text
    • http://micruts.org/userfiles/file/buxonul.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/7934626b882137f342931a38511ed39d/76184268629.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/3239724377.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/42857751944.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ql2plo2vtrootmklpc6vuvh455/volakuwigo.pdfIn PDF document text
    • http://henri-ruch.ch/doc_pub/file/dunijawetojumugibijidolex.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070763c95a91---lizijuzojulop.pdfIn PDF document text
    • https://datajournonepal.org/files/35011619152.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/wofafugajug.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/bomixigilazepem.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ab29d3126---vepinad.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9b0078741---gumozepul.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADA 17800 bytes
SHA-256: f4a2b3f3d0e06081d2007ddd8c8b33fdba3b4c7fb1dd009a124215eca87222d2

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