Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3774ca47eab2c4…

MALICIOUS

PDF

86.4 KB Created: 2021-06-26 13:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 89b53aa86ab4c731852076809f84227a SHA-1: 331efa6d92de4d110528790caeb3c657e52663a4 SHA-256: 0d3774ca47eab2c46c629cb4ab2fb257fef24a407fba28077eb13ea3ca0c890c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a7f10dc54---geratikipurixefilubem.pdf In PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/a399c4ea4ba645a37a7f9e0d26b5f943/4034220941.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/fpnb5aq3a0859umrprrb7no797/30835752163.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cda85245e0---86143418892.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/wupilirinuzipug.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/56375293873.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/zunovivix.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b3e36753e---dezijamiba.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/29356931700.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2u093f8bd1qbnkd9ihf3067if0/tujovuxavitavi.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/88402851526.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/gn1635f7hccm4qsrh4lehae85i/medofoledebajafipu.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ca069cb8aa905fa3679cea6f79a20d3a/6752809362.pdfIn PDF document text
    • http://webbuilders.com/files/file/tazuwipobubezijato.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160d3eb21e4c85---zevawurezunivaru.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/6kpfg4rri86educ5c10jjpaht2/69908547177.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/eba90bf09de52c1d57c112f45f796941/tegup.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-6-25/20210625173151140797.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/64a60a3bb16b14eb6e51e36e5363d782/mijajipelevimoxid.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210614043147_6zty4b.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160773807ea63b---99526381713.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/seduradibuba.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b75a4e946d7---xivajuxudaninepulo.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bae12f8b1---vamugulojopomof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=biblical+meaning+of+numbers+pdfPDF 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_off0000ef35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF35 11156 bytes
SHA-256: 06407c7102fe533a9e1026890ad8071576ea1b80ac1371df0a38c2285fa0695d
font_01_sfnt_off000108d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E8 16848 bytes
SHA-256: ddb64e4909dd2754991a3fe364f9c63d84940750b4946ad33a66bfc4ba6048d9

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