Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ee88f4d3f9f487…

MALICIOUS

PDF

122.2 KB Created: 2021-07-30 09:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6c7041aea0ba26a3eb21b0013c34b1ba SHA-1: c74313354d151024e071efdb6fdfb39ce9a886fe SHA-256: d6ee88f4d3f9f487d6dd7412f1a29f33c6cf8064f7e50c83689144f7e9b3dd5c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/ac343aeaea356a09130039d5be9c28de/20707123527.pdf In PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/f2930307c023f30e54d44875fbd5ae78/xifividujegukenalitazu.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/26317604187.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c8613eb5a82---mivawijizujijor.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/e2d4343fd23e3744fbb67c80f01b8e30/54714110843.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081f5f7d5975---poxamejujig.pdfIn PDF document text
    • http://agrion.org/upload/fichier/30445761048.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afce1279865---46315639545.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/mijatozokinobufinikodos.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607192923388d---26244132439.pdfIn PDF document text
    • http://natproperty.com/userfiles/files/gifapugepujidewoxat.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54a0299b19---filor.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/faredavagofakezumuwum.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97272575002.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/12420219131.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/pajusenipivezaxalodome.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/sisavizeporeroviruj.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/a67e29b16ab6a94c91d5833e3ac68fa9/60443226333.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/dec2f4853bd6d3cbddd3c792b8c95fea/baremebibukogisubukusajij.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/53345513675.pdfIn PDF document text
    • http://aplus.to/userfiles/file/zixixarajek.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ccfba3725ed---80099062809.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=the+power+of+critical+thinking+5th+edition+answers+chapter+1PDF 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_off00017970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17970 11228 bytes
SHA-256: 87702a066c7c38c18e4b6ae2bcd1d248c3619c7a633e5336ca909b8b23bae914
font_01_sfnt_off000193a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193A8 17756 bytes
SHA-256: 87a742f6be55d7ab09fd57846c0081598dfb634284cc7ce8d4bd17abef006e24
font_02_sfnt_off0001c212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C212 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1