Malicious PDF — malware analysis report

Static analysis result for SHA-256 203ae362123dd8b6…

MALICIOUS

PDF

80.9 KB Created: 2021-09-06 01:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a8457c98290a077462f7020902acbfe3 SHA-1: f331128b656b78624cf178d0b59ec635084d1023 SHA-256: 203ae362123dd8b67c8e5e66c9a3d116880933ec6c652c10bd237cc14ca38f20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of a 'utm_term' parameter in some URLs further supports the idea of a targeted lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://huntic.ru/uplcv?utm_term=drip+irrigation+system+pdf+download PDF link annotation
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/0b110e4721f25e7bb874b9d365629791/kulupil.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/47449323555.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/8t0r9r0m1e6n6j45uf0ru97jg5/zesazimivebapikuledobibu.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/l0lg3g97mdr0cebg6n35ppdif3/97382408129.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/60460461424.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160807e600f4b7---fajemetivikubuladezokexok.pdfIn PDF document text
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/76848610076.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/2133b76d6d06dc59155459280e04433b/38767733937.pdfIn PDF document text
    • http://bosch-service-center.ru/uploads/files/71005008371.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/metimumopobuw.pdfIn PDF document text
    • http://cartopack.be/Images/file/luwutofozelum.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec83eb814c---72436179204.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320f9504f41---46176176179.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/nuxowesureferukoweleti.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/d05349b9c52234b69e3f34f151e06788/loxodowawusujabaterofon.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/shu330pnhooel8td5rc9jda193/mezepi.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/zedurov.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/guravovokikezi.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae51c46ab45---kobafozagiwepatov.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/lerilujobekowu.pdfIn PDF document text
    • http://ddgasul.com/userfiles/file/zagusizazojikidagevewe.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/6cd69b5db3b3747b7aed42dbfbe8083b/matafikegorijupisojepi.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/64465099792.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/dunemut.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094aa2a8822e---99175834149.pdfIn PDF document text
    • https://ovistar-dz.com/ckfinder/userfiles/files/37020176483.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/67q0g0o97lbqthq224v1c4ilb6/jegobatixesilula.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-8-19/20210819174329692453.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06C 16952 bytes
SHA-256: b9ade3f2534c819309ed2d59f2bc0b1cd87cb91a6ad12593e6bf062de40fd22e
font_02_sfnt_off00011bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEE 11040 bytes
SHA-256: 4a07b809a2eaa4e81019ebe6c1e2ea9463a0087d6a45dc7e903d66533cdb805a