Malicious PDF — malware analysis report

Static analysis result for SHA-256 74da3b9cba56123a…

MALICIOUS

PDF

70.7 KB Created: 2021-09-05 20:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9d2e71e8640272d5f1a8d803b7a5edc0 SHA-1: 93e090d71e9561b3c269b1d723c684779dd9ec54 SHA-256: 74da3b9cba56123a3bb77bbe610ae974e350b2e8abb8291ce1226886e2bb16e6
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6611

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://synerhu.ru/uplcv?utm_term=english+idioms+in+use+advanced+2nd+edition+pdf PDF link annotation
    • http://banghaija.com/userfiles/file/selovisagema.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc0f188dc6---98682570615.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/bje0mqc1c9qg2l276ilpcdo7b3/11444614514.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/93f3a60bd31edb9860d7da51a52ac886/31724063246.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/6cac35a3e1db08567aa80a2998f83fb1/59513743363.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3a0f1a9de1345efdf437d0f9cabfdfd4/65204466311.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/misibibo.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/18767475918.pdfIn PDF document text
    • http://mazraeir.com/images/upload/files/35605047702.pdfIn PDF document text
    • http://aquatherm-graz.at/files/wodetuzawaredetov.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/5u07jbo6m2rdqrhvha25pcmmv7/jedevovepopuzixek.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a831c44e08e---wurafadosuxusovakodufit.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/36972568047.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160c643f96f8d6---73636501993.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6ff80d40d---25828751570.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/pofene.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d438505c64---79729442057.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1610061536147e---nikuraliv.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608507b9b9756---jonixanutas.pdfIn PDF document text
    • http://heizler.hu/files/file/pemaweroluxoruxilipelod.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd143790229---nekuxadojaxamibeg.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16086bd1e48859---47390959581.pdfIn PDF document text
    • http://burfel.ru/upfiles/files/47464727603.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/gisoxokexilejupaj.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_off0000d8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D3 11236 bytes
SHA-256: 8b5c91485a54f2ab908a236064b5c71fdf8df2217a008ff1d91f4704dc788360

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