Malicious PDF — malware analysis report

Static analysis result for SHA-256 95225ef3a75091db…

MALICIOUS

PDF

89.8 KB Created: 2021-08-15 11:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e004109cf68f8c6c7f4890e381a3c405 SHA-1: b56e0fb3a792fd6fba05305634e07fb615b002b5 SHA-256: 95225ef3a75091db9a0db0282dd06fef1bc9b10ab900fc3603749ca947b2c662
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as a distribution mechanism for phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://catamma.ru/uplcv?utm_term=le+petit+prince+english+translation+chapter+1 PDF link annotation
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/3607732cd546c06a39617045e4a28004/xewedugowitazulolidepof.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607434ed33c53---57315259403.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/33620789718.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/21716975484.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b583fc655da---68565410542.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/pakojipabozuximitowevoxux.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/94218868914.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/wokipanatixakolanekan.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071ed48236fd---63772305928.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092878725b5d---nezudapodolasisakinogu.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/40828581849.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/tumilenonitopuwadozoku.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/32387856594.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/51553164873.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/79213605248.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/91697432558.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea46d9b194---jefalewudake.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16084f4e6039e0---95871797019.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/l7fuudbiq803n1amav2ehr7rr2/89619694781.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/waniw.pdfIn PDF document text
    • 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_off0000fa8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8B 10660 bytes
SHA-256: 0c0a8bbc56f504c75c5ad900394ffe44053b3c8c6d2394e97bd997ead0680394
font_01_sfnt_off000112ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EC 17988 bytes
SHA-256: 701db80700dda46010d94b4422f22e5d373d4272ff1519f235426a1d04d7e298
font_02_sfnt_off00014125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14125 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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