Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f08b5993a9399d3…

MALICIOUS

PDF

73.9 KB Created: 2021-09-06 11:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 054cef7d8e192df69c1f1d32936ece81 SHA-1: 755c12c5dfbbba5203525c188afdcc25145ce68f SHA-256: 0f08b5993a9399d316016edbd4b53c5c36a0336bad46a04096ebd5a45b655a45
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The presence of external URIs and compromised CMS uploads indicates a likely attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8401

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=ecosystem+based+adaptation+pdf PDF link annotation
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813c38f0fdc---ledetovoxenatakiga.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/3ae29f25053f9d9604493cfdfcdeb085/86316243855.pdfIn PDF document text
    • http://centronegozi.com/public/zekideb.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/jovutejijev.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16132c68fe9543---40391075262.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ea8fee899---robejebura.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/16cb08d5825aac94af12c06c4319ef96/50223033050.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9144a360a6---79893889576.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///11074021067.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/divarava.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/fibela.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/dioje3jkspb410nb2c9pd85u40/ziduwipowopozefutojaximo.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/tuxatozov.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c978a3f238---tekoxufiwawaxezirebarit.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608499a25f0a1---giwuwufupilukow.pdfIn PDF document text
    • http://mosjob.ru/images/file/gazomufupizebolu.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f24a462153249c23fa04b693cb05d896/85569527381.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/sifeparanuxu.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/4nbc548kfmtlbakh1si45k05q3/80097020840.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ca30acea157---dugukivupifetaruzubaji.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093eaac0b72a---74213000879.pdfIn PDF document text
    • http://nmglyxx.com/userfiles/file/sabefezixukurutebex.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//45191666907.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/30690009055.pdfIn PDF document text
    • https://rosycaffe.com/file/208228443.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_off00010051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10051 18044 bytes
SHA-256: a9d78a6ca143b9916da2023fce62bd27955f1923a04a722a7c6b0595d44ffbbe