Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e575287abf3228…

MALICIOUS

PDF

183.3 KB Created: 2021-07-30 11:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 563798b543463213339586856fe0a5e0 SHA-1: 77cfdba5c53a044aecdccfaf825e515799bc139d SHA-256: 70e575287abf3228db2e896963520f46bdb42b84d41b08595c877a9c9792b297
154 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms pointing to compromised WordPress uploads and disposable hosting, indicating a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5642

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://crewmak.ru/uplcv?utm_term=jacqueline+hurtado+de+barrera+el+proyecto+de+investigacion+libro+pdf PDF link annotation
    • http://sattamatkapatti.com/userfiles/file/rujiwirosek.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/wivop.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/208042625460e3adf3e6439.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba74f7d6d23---vonavapokeragomof.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/364ca03096ce551947867ef2f9c9ec16/jizafavezozekelo.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc6b2a62fc---3021711017.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/zulasagovusexuz.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/zuvizabevenorofobobo.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/25555222601.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/dodutir.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/zuxojobevuviwativ.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/kodap.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a67333e9a---95734967939.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/18123044683.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15552919327.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/7e1226690984b51dce08e13f6db00a4b/17963062723.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/dmrkmgq4m2qbaoohkriillbee0/bejonok.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/26422728343.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/53413744004.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ddeb299407---kelebulonowazudosaro.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/r1hgldp1595270pgio5mklet7o/rutagijiguwavewagojujigiw.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/b871dbbab7bd8f92349d2d830678ba36/58221069667.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4663b5cc8---gixixakedizas.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0181688b8---rurujabixob.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6cd71a95c---moriwatatetosaganowibufov.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28C8C 20532 bytes
SHA-256: 87ba2e2b5741813cfc8b5adc0f2eb74ea2c70b421bbafa2143fd7fb9df032be7
font_01_sfnt_off0002c1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1