Malicious PDF — malware analysis report

Static analysis result for SHA-256 870737d3222d3bed…

MALICIOUS

PDF

66.4 KB Created: 2021-09-02 05:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c67be03c63685ed452809e7c0bd6873f SHA-1: 45304d4e1075e37d37b4d3a0fe54bc0c6cd400e8 SHA-256: 870737d3222d3bed929a8de9eef77980f7cb2aea82d27c0381d299eef1b2c6cb
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly indicate malicious intent. The file's structure as a link farm points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8294

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://nomylo.ru/uplcv?utm_term=rough+upbringing+meaning PDF link annotation
    • http://morethancars.nl/uploads/edytor/file/78229808071.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160e1d3f348e53---15454530907.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161184efc1d14f---devogewepagotil.pdfIn PDF document text
    • http://ssujaxchapter.com/clients/83257/File/lejerixugiwatemujujelep.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/faregexuboxorefodafowul.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/xipoki.pdfIn PDF document text
    • http://cba60.com/clients/6/6c/6c2dd71b6188bc8e8f5adc6209c6f86c/File/dovomumumufijaxogoti.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/g0o87k3m710d3m500bk3hfujn7/bomebitisejutukonuzal.pdfIn PDF document text
    • http://bakoca.hu/files/file/35528918578.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/85952268029.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7afb83b324---raniram.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076602f9209b---darojagetaporegewi.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/gamog.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/134ab8b9f60676537dc803d473511116/zuzumivusodemajakezazu.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160febf7672643---satigevuduxurulebijizok.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/46414577264.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb50360a79---papexe.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/61144450235.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/9758397669.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7d885a3f08---rilugowirajeto.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/safajanufenofevofogipobe.pdfIn PDF document text
    • http://thegioioto.store/upload/files/52551373190.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/5gk4ce7qvn74u3csn209gt9nh7/vupomotugumurajagevar.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/7ve07vqh6fl6netlf6egch9rs5/89344545862.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_off0000f0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C4 10672 bytes
SHA-256: 17c1ef320a38624faad23e6ccce865d6538e47e4e35b8e649b2de6de5260798c

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