Malicious PDF — malware analysis report

Static analysis result for SHA-256 760a8226ea846437…

MALICIOUS

PDF

90.0 KB Created: 2021-06-30 10:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7b3c7d08db1778685b6665227caa224a SHA-1: 91057206e400bf53fb71abc0026d013c34e35bdd SHA-256: 760a8226ea84643777eecf051a08db6042b3f3f8dd6a6f5ec81d49cd2dc9da88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, directing users to multiple compromised WordPress sites. These sites, in turn, host further PDF files, indicating a multi-stage redirection chain likely designed for phishing or malware delivery. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://irlanc.ru/uplcv?utm_term=rafale+in+action PDF link annotation
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afe99add92b---larufenu.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/dovujonotulomotop.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b6602b9a1---rekufebuvofepax.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/c16355c4596df356f5ab0ec23388cf00/nimewikatoguvasoweleza.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/b7d5165feb268024059156056ad965fc/87950482766.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b5aca1c6c---41964600126.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/gifunawixexeg.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/2a93b041a51b86836f4052b096181b61/julolivozutejosimet.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/7c149482f553aa761c293dfd0e20705a/85442376512.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/dazija.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/vekesovirizijovesos.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/eb5ec801cd4b569f0c7938c90f7e15ea/jolux.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/6716d4e8d5f250fef702e726c21405aa/31256339302.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/b2f52919f572fc72f2748119507fc066/43564523582.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/vj8qjpc1m8hce8frepcev5bq50/suxijafojesobopawu.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160757fc273399---53243870737.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/epb1d2ph8a79ot1ts2h9gpap31/41797351557.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/27c9757f4788badd054ddb093b85aeca/nozelajuriwigitex.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/r0l5gdhmnit5offoob1fth5g81/10756127079.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/23449808445.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/91923053491.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/xujubi.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4abeb94567---tawut.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/4f7a43e3c2507a5d0a56f1b3b9e89a01/wolexumokulifelemaneda.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa41a15354---debuwaluvagisotifikovad.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4982475a68---70547385700.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607042f3c9b2f---51916535148.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160da2c03831c6---100728314.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_off0000faae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAE 10108 bytes
SHA-256: 33cfca83cbfdf74c39e47eef319bee47f3070f0154110dadb62faf67d6912e68
font_01_sfnt_off00011155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11155 19088 bytes
SHA-256: 4d4fbea5421b27f034838d4f3de9c656b1558ce061804a13452fd4d0b5aba962
font_02_sfnt_off00014294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14294 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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