Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce26362fcc623fc7…

MALICIOUS

PDF

78.1 KB Created: 2021-07-09 04:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ec275a02b48b28e43cc4911912f8157 SHA-1: 8d32ec74c9e322757bce055062cf0c3351b863c4 SHA-256: ce26362fcc623fc77ec2f74ae360ad6b086ad4f734b906e39fe55ccc0cd7c4df
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. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/093fc1590fced39d119eb7c71bb74d8b/76628114025.pdf
    • https://karpzbeldowa.pl/uploads/userfiles/files/muforekaja.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a927499aa82---10655873664.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701c863a676---juwafanigewekuworaz.pdf
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/nenusopetosurazuda.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/0e3a43cf542601f82fde02507ff9f0f5/20092748422.pdf
    • https://synersys.fr/contenu/file/wapukoruved.pdf
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/pakijez.pdf
    • http://lovesushiscv.com/uploads/files/zusoniwipitaderamogupij.pdf
    • https://hondamienbac.vn/userfiles/file/xipumakuwa.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071c63edffb1---pobezudized.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/cd95e0a300008bb668f6681a3081f6dc/52066067741.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/m95pts9knp1v84m5an0af2jccn/rirudimakodoniso.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5ba2e78c54---12648289742.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/eea25b811065787c300de5b1bb7b2091/kefetukalob.pdf
    • https://nepalmicrofinancesummit.org/userfiles/files/xixafatirizilu.pdf
    • http://vhktn.at/images/content/files/80719224103.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c63daf7b731---buvatodutovoxezu.pdf
    • https://retrofitoman.com/ckfinder/userfiles/files/34885337043.pdf
    • https://jewfri.kr/files/image/files/33573472756.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/4770d456b7ce8aabad46756199509399/dideviburised.pdf
    • https://foodphotoshop.com/userfiles/files/vugana.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/c70c21aa2827ce74df9ff4c4e85b7270/60377620695.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2934b970d---fegabubanip.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+find+surface+area+of+a+right+triangular+prism
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccf1.bin
fa753091c2144285b9ce143706584a0a91ed0b7097b61c17b454c820c38d8a1b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF1 11244 bytes
font_01_sfnt_off0000e6eb.bin
97c9ab416c866b454a7cfa1dd0f21f67c443ab41746ed2bf43fa5e3bd36afb75
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EB 16864 bytes
font_02_sfnt_off000112b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x112B7 16792 bytes