PDF malware analysis — malicious · 9dff19ed29990edf

MALICIOUS

PDF

81.8 KB Created: 2021-09-04 12:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 47957fe2676c55eba672ef5fe44d2609 SHA-1: 5879636c32b8809d15733b5b4c7569715381a889 SHA-256: 9dff19ed29990edfcca11828fc7401e4a327a5d3b2f8fbf57e02c107639e662c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to potentially compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure itself are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://royal-art.pl/uploads/userfiles/files/gejosezezinesale.pdf In PDF document text
- http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c70adc897aa---31784461134.pdfIn PDF document text
- http://tobn56.com/UpFiles/file/34331080645.pdfIn PDF document text
- http://mysistermyfriendministries.org/clients/85776/File/96144630681.pdfIn PDF document text
- https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c379232537e3b870103ee3c189b52d1d/61559462571.pdfIn PDF document text
- https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/0fa9f094c8135eb2d4369ec663778b14/buzosobetazafimumikokute.pdfIn PDF document text
- http://ekolojikweb.net/upld/userfiles/file/sevuvo.pdfIn PDF document text
- http://puntolinea.org/userfiles/files/koluxewazezotukizivoxikel.pdfIn PDF document text
- http://pileshoppen.dk/userfiles/file/36121882227.pdfIn PDF document text
- http://ctm.it/userfiles/file/mizexufi.pdfIn PDF document text
- http://architetturaurbanistica.it/userfiles/files/naletunizebabumilaziwazur.pdfIn PDF document text
- https://camgloberealtor.com/userfiles/file/44357167046.pdfIn PDF document text
- https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/923185aa8163d00484be92b69b80456d/99150567827.pdfIn PDF document text
- https://dovolena-jiznicechy.cz/uploads/36195614259.pdfIn PDF document text
- https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/c00de23130dd471cf56e6665860875ea/21302272810.pdfIn PDF document text
- http://centralcogtc.com/uploads/file/38860923966.pdfIn PDF document text
- http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1628894613/files/8132215678.pdfIn PDF document text
- http://swotaweb.org/img/upload/file/47532573641.pdfIn PDF document text
- https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/e37gn1psfh2bveovu9qe4n9tv1/xisimo.pdfIn PDF document text
- http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097afa26dceb---19446564981.pdfIn PDF document text
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160fc3dca02cc9---gujiniwevomuxawurur.pdfIn PDF document text
- https://bloomland.com/sites/bloomland.com/files/lojerusiratapozanu.pdfIn PDF document text
- http://agnieszkapawlik.com/userfiles/file/47824757079.pdfIn PDF document text
- http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608917a99bfbc---nafimoxovizuf.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=meteorology+today+textbook+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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d6b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6B0	10748 bytes
SHA-256: `44efe5ab9b2b62d09d750f856929b3d49a7226796dd3b505c1beb92ef7747294`
`font_01_sfnt_off0000ef2d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF2D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001073f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1073F	18876 bytes
SHA-256: `e7c2393dcc6b1d3da595d082b630cc73e4722bf54c90834acb1c7e13be2fefee`

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