Malicious PDF — malware analysis report

Static analysis result for SHA-256 159579468a813182…

MALICIOUS

PDF

63.7 KB Created: 2021-09-06 03:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9a2929f7d62469db52b9ab08521acec1 SHA-1: a763e0341b3213edae4e252368c42cdeb772ade5 SHA-256: 159579468a813182b0144e43b8d3c6ed8c9d9a3c961e708ff67d03772581ecf3
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or link farms. The embedded JavaScript likely serves to redirect the user to malicious content, potentially for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9183

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.
  • 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
  • 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://coretry.ru/uplcv?utm_term=literature+review+psychology+pdf PDF link annotation
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/ddc00101f0e65b22b215e65963c83547/gokupovamobiwi.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/vimerajor.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c43b068f51---surilurozumiloxodanipe.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/56506555443.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c6dcd712e---56915545764.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5856d55f2---rijafemetosogatitivinuvus.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/komirarudapomatasareni.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/96365428794.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/59041469330.pdfIn PDF document text
    • https://solo-enoant.com/content/files/files/87029721040.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3692676f89---dokiralutirininog.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0a71b0704---bavimexugulupebiwumomiwe.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/15523933607.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/lurirejefovolenuzogusore.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/xibivifaj.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae919f5d7bc---wewotuzafitoxilo.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/ruwopebarogolusotezor.pdfIn PDF document text
    • http://naucseto.cz/storage/31695355173.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/kimurajukawano.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/14880519616.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/67458308804.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210902064633.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bc5dc9678---mutugurapuponaxaku.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/nibabepaziwekojezis.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/witidukemajitejavaxekoxul.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_off0000dcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 11116 bytes
SHA-256: 61c1fdbace172d7d48f929b46fe03fdae66864f3722b117f2b6c8d232eb812c1

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