Malicious PDF — malware analysis report

Static analysis result for SHA-256 be89d8d3860224fa…

MALICIOUS

PDF

80.5 KB Created: 2021-09-08 02:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6882f8c3a6c1cdd0cf8b6a96a5286852 SHA-1: c4bd40e193e58983c3e7634c8d12b7dccdf1010b SHA-256: be89d8d3860224fa82be25f8371c47f3c5f67b0c4a7adcad66ebcbeacf5e332b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://savitaco.com/uploads/images/files/jojevotud.pdf In PDF document text
    • http://cephedanismani.com/images/pages/file/bulirusikiwekegojezejiba.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lizagewumofafiwixix.pdfIn PDF document text
    • http://tctrack.vn/images/newtech/files/vujukixexek.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/jerewepavevugujosa.pdfIn PDF document text
    • https://agatanorek.com/files/file/titufobepipofuzabosafa.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/tusogotogalajipuxeb.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/4875f19f2f5db47d043efeb73debebb1/bajebevilip.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/xununewunumejabazupum.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/34991791340.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092594fd3c02---guwoperagiwaxizomenaw.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/1335041381.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/taxisexonusu.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/92091043254.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/tikezigof.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/kekerigudeverizozirimab.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4aeaf32c3---47808282075.pdfIn PDF document text
    • https://smaransaving.com.np/ckfinder/userfiles/files/topebulizo.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/dasizebegegebotute.pdfIn PDF document text
    • http://touchpanelpro.com/upload/files/tebukuxetotak.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/37549353369.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/74q7sfn3km7h424n510afp6cn4/82483581683.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/9ddeef4060652e11f7a374e99b2da2da/15155854297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=electrical+automation+engineer+resume+pdfPDF 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_off0000d5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F6 17232 bytes
SHA-256: 503ac54714c24a0a3c8d83b1f1ab4c8740408ffbc0fa428e1db8d5f7f9dfefb2
font_01_sfnt_off000102aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC1 11044 bytes
SHA-256: 39b6b5e969ea35c4c72f4a97e56fea6580082035c1fb306ae8e6a15f0d088c26

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