Malicious PDF — malware analysis report

Static analysis result for SHA-256 575ce8811f753567…

MALICIOUS

PDF

87.3 KB Created: 2021-09-01 10:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7cf22c6633e1741e86272eb3c862d94f SHA-1: 4755edf0724a657e681aebd77a8a18122b5f8619 SHA-256: 575ce8811f7535675e43e37fc43598578e7763e141f89db77723ee65138575c2
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external URLs, some hosted on compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

Heuristics 6

  • 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
  • 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 http://richwoods1969.com/clients/861079/File/juxogevituworo.pdf In PDF document text
    • https://markmont.eu/editor_uploads/system/files/megajogileviliwemideno.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/d5c33281b1b5ce8d1420bd66186b7c0c/galap.pdfIn PDF document text
    • http://ijpdua.com/contents//files/34535734912.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/chogqje3ipaobpc310m7n4jhb7/85765745432.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/4e49553cc5cf44de470f57024b8ffca5/wizof.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/fizujitakusakazoratigabes.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/33697215837.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b029e757f0---22362456741.pdfIn PDF document text
    • http://agama-rc.com/upload/files/99678979023.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/ramatoxinexegomibuke.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/41088804317.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/tepufobumupurewekoribi.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/kojazikixefo.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/20/file/20210520_202231_117.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d49a81f91e---47087047777.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/94177634202.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/suxozovagabejadotidoxono.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160946128f33df---jokedogifedavu.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/zukoliwajakegerisepokemek.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56097c2f1c---geneliwuval.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/36059542989.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/51869465268.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/f5me88js7ge2bp780joe3hgjpt/76268358077.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/magawimiga.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a983ad2abe76ac4aa98fb4637203619a/56129724688.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/7e69e6297f993ae61926922f74372d02/39855118525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=world%27s+first+credit+cardPDF link annotation
    • 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_off0000efea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEA 17852 bytes
SHA-256: 31f7b6df307329389f0b8b875dc629f9c9ace5719eb60551d7249e68b36aa98f
font_01_sfnt_off00011e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E12 10392 bytes
SHA-256: ee5fb882388748959e87a551d60c3e0e2a93a7b06d4459f248f2e4d2788cf163
font_02_sfnt_off000135c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1