Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea81b6b1c3533fc…

MALICIOUS

PDF

217.4 KB Created: 2021-07-09 16:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0c34c61c4060286ee7dcff2f4b58d07e SHA-1: 379c6d83d44d9f8a5962e214bda58d4d54683159 SHA-256: bea81b6b1c3533fc6d73c707947eac0f57bf8e01eb3e478501a6beb242b62cad
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories, suggesting it is part of a phishing campaign designed to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing lures that often embed JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c228859ce---molexef.pdf In PDF document text
    • http://fluellentrees.com/clients/58222/File/29813439129.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/zupawibifidaf.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c60e6647d---52241621620.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/gebevinimezuj.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/a47850a49e22110eeb34032cb606b392/rebetux.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/demevodoxoxafebimegedu.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160876d4a101d0---30184243540.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/bejojam.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/bepevazesofapekopak.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/6663be7210a5e414a6717e6e5a434563/53677202423.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/rikenad.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607006ea14e07---mugopavopezibodoja.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/409307540a33c5216b96e9e514ae6246/14635743010.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/10503f3fc0eb10e22d0c532614270402/89781753858.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/11d3c02277140183b3dcd36c207a420d/vetaletumejima.pdfIn PDF document text
    • https://curryleafharleysvillepa.com/hang/userfiles/files/dasipusavoxesijaxewug.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/cc32dcff935355c23a10a3f8fba3da1d/70442578688.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/d13c403ca0bb83cc8235172f3fde1254/82840875982.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/47942357024.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/e90aeea93474ebab5f8bccfcf207d62a/jeroxiwomemezafupabepu.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/ce1c8e03742f351249223c03d8c6af07/pezezipoxipitoge.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/d25efe110a099d1f22e78487e0a82b7b/42688003105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=pranks+to+do+on+friends+on+the+phonePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002f6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6FB 18404 bytes
SHA-256: 0fafd4c7bfbeba51e695563283be155b66694075e9140aa4fbf751d3d26b545a
font_01_sfnt_off0003270b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3270B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00033f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F22 10644 bytes
SHA-256: 7b3827517edc43e66551b3da775121ded8954f6d3d3cf8db58af506175852a02

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