Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd49baae3a4e845…

MALICIOUS

PDF

96.0 KB Created: 2021-07-05 20:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0d025ccf811ac2dd9e77cc33ad019254 SHA-1: 15fc3ef825f3657b068d7a438721773d41a872da SHA-256: 9dd49baae3a4e8455bc7e234d9d48291eacf80aea115b75ce2517444e880a0ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and a link farm heuristic points towards an attempt to leverage external resources for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/ke9qor5r8dik5oldssvogpu78q/98597182718.pdf In PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/e8a03457778cd17acc79623293090da4/fozedutilisafesopiwavu.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bad051ac25a---15222863636.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098229fd8ef5---31022495050.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/eeqgghv85a43rln9cvpr0qar6p/93617289264.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/xulugajedevojasoba.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/bktpfqm0gqmgn7t32o9u2qs2kl/wovokovok.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/buxubedubigezupenowoje.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/90a8e170bc10e04eb56b0692338c5528/toruremawidepovudorugeg.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/51394881324.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a883cdcfe35---61906543090.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/89685221198.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/zokekivete.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/25930749973.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/5a36644d9015d481402857fcedbe9a3d/57694415577.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/wavixefo.pdfIn PDF document text
    • https://mytopics.it/uploads/file/binexin.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/d9639d2576732ee0df0f77411721b602/48933453818.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/tnk0kn4qnoabgirrikaftrlkgf/boratikinajefanuw.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738d6679703---faxilidaleturojo.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/togasisimogefidekitawesep.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a68a8895914---ruwujelusoxeju.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/36451507262.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/93952949970.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/rojafakivowelekuruwagiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=pro+ject+debut+carbon+user+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_off00011120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11120 10808 bytes
SHA-256: d02c50a0ef297b8d2c822b284e20a0f873ba9fb8ed08b93d4b89d7f8679c382a
font_01_sfnt_off00012a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0E 18876 bytes
SHA-256: 3c38537bfd29fcbce004e27a722a594af51282293038bef504fd36a8c525a259
font_02_sfnt_off00015ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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