Malicious PDF — malware analysis report

Static analysis result for SHA-256 b893f7860e458ff9…

MALICIOUS

PDF

73.5 KB Created: 2021-06-28 01:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0d3fdcf3a0801c24ff90df47d0408bc7 SHA-1: ef1c564ef46676d67f5291c82cea3977b2590888 SHA-256: b893f7860e458ff988267e067cacebc04acf437ae6fa5285ac6697df660dc02c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many hosted on compromised websites, suggesting it's designed to redirect users to external resources. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6437

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 http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16094ca73da69a---bakoxipasagiwaxude.pdf In PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/89495089417.pdfIn PDF document text
    • http://www.bash.cl/media/file/majolefupobixe.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082bf1f6b0ad---8155354570.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076f4361d9a4---kefamesovuturoxusilizal.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/zuwaxut.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/womapoxukifow.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c404e4b552f---20917446277.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/2tiq4nafo3t5krevbnvl6n97jp/ralutisexilud.pdfIn PDF document text
    • http://starrsgazette.com/admin/images/file/17442451490.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/popajimebevefasudepawa.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/c307f49accca6cef843ea18e973382b8/wufimojizutaliv.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/5ir3u45sq66sdcv83as9b8qhba/69909167612.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16207789908987.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d92da0d50---60775862714.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/reviregilajezab.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/83ad39d19a5581a5015c650bd28e7641/19052378112.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/72b0d5174800cde552ee37e260271171/zaviv.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b40334b50a5---nubanobu.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210514183030.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/xokezopunixulewozi.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858cbd7d012---jixoferudurenuvej.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/33516389153.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0919727b8---kidasiza.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/zatakewa.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/jatuvusoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=mini+tools+power+data+recovery+crackPDF link annotation
    • 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_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 17748 bytes
SHA-256: 17aa6cfdd2ef0b46abe55edef0a5dbd35b1011c5656eb94be24590fa35d56357