Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bf596c7a2a1951…

MALICIOUS

PDF

86.5 KB Created: 2021-08-29 15:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 12e22fffae8ca2d5ba33d8cc97650712 SHA-1: 9be18b936bb2621d09c8c115b41942ad51efd36d SHA-256: e6bf596c7a2a195102abc4a98c4e40d53591bdc6659f4b3853b650a53eb129e3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML score. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to potentially malicious content hosted on these compromised or disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ecb9d30a5---42138374660.pdf In PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/65dd14de472147af7c699758011137b9/senutajavoxupunag.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/607862fb0d1c93aeadce53fe57b1c63b/74511680726.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/73coj6d39bq9huj87q3td1q4pr/51329993632.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/jozagamodenaxixat.pdfIn PDF document text
    • http://thephinhmienbac.com/upload/files/ludetodulilepapilenexo.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86ec2275b4---vizunalijo.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/85985055938.pdfIn PDF document text
    • http://ssujaxchapter.com/clients/83257/File/lerabovizisabasidid.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/buxaki.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/mimibopelizesavomupuwavo.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/c74d633d39bb88c50baf322c5daf4814/nobid.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/e28574b18713fbc335bb068da41520f8/vigameforepaki.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/bakimive.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3c6d931ce---13267172875.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/75353423574.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bf294d2c0---dajejiwibutunonebagaj.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/86841033715.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/denud.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086e3dab846f---93670124521.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/72dbbdc1bb69f1068dc61385f1917459/porezikijetufozakuvuv.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp//files/xixegozufinuda.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/15414592440.pdfIn PDF document text
    • http://agrion.org/upload/fichier/jakabibifezubositu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=moroccan+spiced+lentilsPDF 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_off0000ea1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001022d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 18756 bytes
SHA-256: 44afd5dc30b69960a2540e02a78249806839cae00a737b35f22d34db97865c64
font_02_sfnt_off000132b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B7 10500 bytes
SHA-256: 2b6369103f4cac41263f6f1eaec8fe67f546e64cf02738431d75a4adf888d09f

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