Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a23215eb9be309…

MALICIOUS

PDF

85.1 KB Created: 2021-06-29 13:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b11552fb78793a63731b4d70813c3264 SHA-1: d028769dd9f615d85ff143c55e5a1e42ca23aceb SHA-256: 90a23215eb9be309ec790b1d986f2da8feec6b1a5ee85c09be5cab3b23cf774a
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS uploads and disposable domains, indicating a link farm designed to lure users to potentially 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 0.9860

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 https://garglob.ru/uplcv?utm_term=how+to+make+a+modification+station PDF link annotation
    • http://doks-films.com/pcms/content/file/sedodobukubu.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/90fe538453d3a00dbb260a51b7beeaf9/68299970559.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210620032518135.pdfIn PDF document text
    • http://yilip.net/userData/board/file/sejusibonopigikenapo.pdfIn PDF document text
    • https://oliogalanis.com/file/vavalomixaw.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/830b7e91b14dea04aaaff5d89afe43f0/76663681150.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/6konnuq1pmguec60unsqpch8et/wewakezip.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094944507eaa---figenakavidazezaxufunevet.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/6a67653ea3eb0ec63793110baf2d00b8/99793900142.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/nesibadewinadobasixa.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/85cdd0ffd0dcd548310218d249c6d4b7/davitejodoximez.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/82182201037.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/wesekokebiliv.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/72239573538.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/c8f2ca98666af914f5bece6b3fa9929e/wixurosexodepaxedotilutag.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5655d20713---giril.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089482a4f99e---82517107941.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d90b9631bc---rixaligejogozubimibilog.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/1463494aafd43446fcb72eca5fc2ce64/xonotexa.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/nugojateveluma.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160726675af49e---80170380111.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/h3ddb16kf6dn7jt2mad2sh3q0r/janotosorufitafitebe.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e80da7dade---seripobulolokanukozaj.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a283299d5df---ginagebidatopupavo.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/a97afa423fe644d135161475b843a2e1/56955541420.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/83088851019.pdfIn PDF document text
    • 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_off0000e9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 10660 bytes
SHA-256: 0cd3e3282b3ef5fc88c20a9cbd860b0d3755b50aed79b6137aec8468bdf8b669
font_01_sfnt_off00010251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10251 17120 bytes
SHA-256: 04d75f993e0814289bdbfd4dc1afce3deaa28594ebd8a4ab26349f7cf16f7a92
font_02_sfnt_off00012eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1