Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5357bff8f2b7ab2…

MALICIOUS

PDF

88.0 KB Created: 2021-07-25 08:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 063bb2c376bdcf0565ab9afc26db208b SHA-1: 7c2b6145233c52fd4cbc024fda9d2eaca6728056 SHA-256: e5357bff8f2b7ab2124053fd911dc6fe677dae8be9f514e97b0640d1b4b5a9e5
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. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://mywayrtk.info/userfiles/file/japozabisenike.pdf In PDF document text
    • http://slp70.com/clients/873855/File/kubogixaropavigatixa.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/c89742631027bfe47c9facf481404b00/52518177435.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/52273786537.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/tebusefopifobipejali.pdfIn PDF document text
    • http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/44382097619.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/c641a54616823a10947e362e6e9ef08c/84526688408.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/fuselokijudifisuka.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/87527579891.pdfIn PDF document text
    • https://oversaslogistica.it/file/83490415357.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1f84db3f9---xevozunepimagopowa.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/nidejixo.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c11388882b---82366111820.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f804146df7e723c9dc4fe96d271a651f/87997746072.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/bajatita.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781e4ce7fcd---poputitiridadibakuvunojo.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/fosisatusawimagomiwu.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/17045758916.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/13915356135.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/13620922682.pdfIn PDF document text
    • http://moristas.com/userfiles/files/rerizupigefurojonuwuluwob.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/niwofudaxosudipax.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a4eae52e6---53378720042.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/ce9df1c9327c3e9abe4563732d0a8cbe/tubitazatojilevuzevazofam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=bhakta+ramadasu+mp3+songs+downloadPDF 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_off0000f2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF7 17096 bytes
SHA-256: b69903450b923a278c36b3eb3a6bc3b6b3cc809125cde46d7f70da77036efa2e
font_02_sfnt_off000137ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CA 11116 bytes
SHA-256: 192c7ebcd61f2a0633362ae2697f903b17bbd61c5647d25e20b4247cd4e2129b