Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f07e9a6503420c…

MALICIOUS

PDF

71.0 KB Created: 2021-09-05 23:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 42c942ea2a486e0956d09e8f0274790d SHA-1: 35b8f7307cc8be5a0ef61f7a23093ac80c2d5470 SHA-256: 28f07e9a6503420c9f18b7298d693620e664acc299fa87f13cdd43761ebb7f48
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The PDF also functions as a link farm, directing users to multiple external URLs hosted on various domains, some of which appear to be compromised WordPress sites. This suggests the PDF is intended to lure users to malicious content or facilitate further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/96009319565.pdf In PDF document text
    • http://msinziniering.com/userfiles/file/xorem.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/bf9c0d577fc65bbad00e28940b9968b7/bejelob.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612c19093b4d4---tawuluwewujemobipul.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/2oljs3v7m645263r4bjkv76pps/90360593845.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/52753105dac376cc88d487979447a016/zapugepaporoduwimiz.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/b0f343280535af79ff14231de17e1d41/25108149098.pdfIn PDF document text
    • http://cmtsport.com/pliki/surowuwiti.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/phkoltmcts2kpgmb4dis7ct2kd/gudigibep.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/3cc7f9461d0b7f6bb2667962bf6bbbeb/famasadodogakobozetopefob.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/3910120602.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a492517d14---97714530517.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/6a8pa59qbgfnulre6mo0j8h6j4/27186043476.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/buzosuramoruzifu.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b29564bbabd---68870392134.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/kujesizeke.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608abb5107f92---vuniwofenomopo.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/58904460657.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/muwugetewujapasexevexo.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210516132053.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a922fd9e34a---pusidudaxu.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/26176203828.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/5219267663.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=fwb+p8x+manualPDF 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_off0000b5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E0 16220 bytes
SHA-256: be0c975075dad272ff02467115210b70f9aa0912e2d54fa09c9468971862b30b
font_01_sfnt_off0000def8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF8 10316 bytes
SHA-256: 3a95ff08a0ee400b265899a997e5bf52141de95712d35519346fba603688631d
font_02_sfnt_off0000f5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.