Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00929e07c791fc5…

MALICIOUS

PDF

90.3 KB Created: 2021-08-21 00:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d7053c577c57a06faf5dd2676b87db8c SHA-1: 0c988cc8d2f5abb35aca78339352b106a4df0937 SHA-256: e00929e07c791fc546b39be4f30571cc1cd541389f2de4f8baf47c7ad9616bd8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and heuristics suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f25fa20f20---13319434084.pdf In PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bb756f018---wunegikadikozikelixiza.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/96007879895.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/p1gb32rolgou76hvl3fqqjjs5m/26577999142.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/xetuzekotukivurirurixuwe.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/jatidareger.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6485432b4---68363932323.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/30297413085.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/25f8381a163ad24e7616dc1effb3c6f8/fuxuz.pdfIn PDF document text
    • http://tencanpowder.com/d/files/227167503.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/7399659350.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///wakonomakeredafovaf.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7814c5f71---bugudegifuxumurafut.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160841436a2b13---xiwaxelimajugegesam.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161201b2fbad4f---4512451805.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762e5b7f8b6---donobunutovegarupujob.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/mabeja.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210618_065152.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091aba0ed05e---jolozugubekidaza.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/gigefunipewew.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/ffdee44644f642f7bc029b378abc5ced/pajezikexumajiki.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aee01c20584---24319356921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+i+see+my+saved+wifi+passwordPDF 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_off0000fb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11332 10668 bytes
SHA-256: c0a20d8febae0773f31aa2bf4f096c57b278f27b710771beffd601440bb752d2
font_02_sfnt_off00012bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB2 17744 bytes
SHA-256: b19646778aa45cf95aff7a050bee38b07b9127165306f2f7aa12d696fd1a1cff

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