Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb2823045211cbf…

MALICIOUS

PDF

69.7 KB Created: 2021-09-27 04:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fcca78971bae3e4cee4c55307436d552 SHA-1: 6b0b90af632be22d49a193dcc2e305004da1af7b SHA-256: 1eb2823045211cbfc2a515493e88bd4e44b60795617658ba6e98e50dab764db4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, indicating a link farm designed to redirect users. The primary purpose appears to be directing users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b301b75d3e---98285867649.pdf In PDF document text
    • http://leeandrewdavison.com/download/76202502813.pdfIn PDF document text
    • http://iccarrentals.com/files/file/57786404228.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/967e4f87b85b2d2306ac38ed7d792c98/bufunakepemusujawe.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/16290863093.pdfIn PDF document text
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/vemesowodef.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/luxerezubex.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/b4d6e1f894920bd747db0a6143343e55/nemobuxorotizijudibe.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/tevefomorasubeni.pdfIn PDF document text
    • https://chogmai.org/ckfinder/userfiles/files/nififitu.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c1c900ac17---lugifumoluserodaguz.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/wanepi.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/56287922484.pdfIn PDF document text
    • http://annabarons.lv/files/files/mixizizixunetaro.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/begekomugedor.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/tafedumezekigerulafo.pdfIn PDF document text
    • http://emachn.com/data/attachment/file/22656845793.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/zakobivuxisojezesazu.pdfIn PDF document text
    • http://selidbe-beograd.info/files/faratumegu.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/201410523030.pdfIn PDF document text
    • https://bonaparte.cappencms.com/templates/files/rarokazefu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614baa95de642.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90683146069.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd1856d6cd---boxupajawunisaliku.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/donawugan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=kingroot+how+to+usePDF 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_off0000b482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB482 10356 bytes
SHA-256: 128d15097dfb83f640127bcec23205ce10a3d24585e174cc762ee733c4dd2ede
font_01_sfnt_off0000cbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEA 14812 bytes
SHA-256: 9f5c2b3344857246a32b3d9d26c2ec034ded52bb585f2362f4d227bf96b43f6c
font_02_sfnt_off0000f115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF115 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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