Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aeeba3c02cf44bb…

MALICIOUS

PDF

98.9 KB Created: 2021-07-28 14:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 654360ec6d3cef0a3634830914006417 SHA-1: 8d0a356d5b6281894a82227d93885b4acea5dfc4 SHA-256: 5aeeba3c02cf44bbcfc5964ce7731b1af285e629ee85f30f0045d0f743166bea
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to websites hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://www.moyekolodin.com/files/mokoxewivasasi.pdf In PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16077381b50eb8---bafakoduzopimotimen.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/1095965543.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/44054543822.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160785a6a5ef36---nokamobaja.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/ce4617b81e82a3f2bdcd79d11b86e693/55569051141.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/sisujijexebo.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6df8b3a74---99116601912.pdfIn PDF document text
    • http://smitheaster.org/clients/861344/File/43862585845.pdfIn PDF document text
    • https://dintek.eu/uploads/file/bezadimejelizap.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b47ec10278b---zopuluwomofatiworan.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/72892690709.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cfd93cfa0---xuwexapovumakixof.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/1o4dfuftdcma9u8dlpjb86vgh9/22349042112.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0402d2242---84054648876.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/1d507e017cb14eaf68cc1d8a91a7d0ab/fukudovak.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160927c1651ddc---74936061519.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b309e31eab5---bajiluxiwagonuzuka.pdfIn PDF document text
    • https://seerupit.dk/assens/file/wotasojeka.pdfIn PDF document text
    • http://519pf.com/userfiles/files/78148484421.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d5bd87ceede---vesezilulaz.pdfIn PDF document text
    • http://gyobel.itpublic/file/4159656400.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/25884324654.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=is+it+illegal+to+fake+a+dna+test+ukPDF 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_off00011fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE9 10572 bytes
SHA-256: b498ab41d0ae856fee7b5aa9dd9e46a772122b8619896d39b5f94a7a8912beb8
font_01_sfnt_off000137f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15008 17480 bytes
SHA-256: 341ebe8fcdc48a304f54b8486bc4a7c60bb4600d3f850d3f1a5a734c181b5360