Malicious PDF — malware analysis report

Static analysis result for SHA-256 692482a6d48146f0…

MALICIOUS

PDF

98.4 KB Created: 2021-09-07 06:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 975f0987844da08f3aac346f6edf5e75 SHA-1: 62e84bf6a5325d9c0117f74e7eb619f1e11c88b4 SHA-256: 692482a6d48146f05602000e2cc736a8b8c94eed341369b6a66f0dd1d7a645e2
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URLs, many hosted on compromised CMS platforms or disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is a phishing or malware delivery vehicle. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=emmanuel+levinas+biografia+pdf PDF link annotation
    • http://vidol.nl/userfiles/file/wuzagivudiwu.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610cea4619c72---biravutujapavosefavowez.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/5cf4a5837092653f28943b6a2fc06f1f/83597336796.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/mebunoxuxuwasuguxisi.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/ee33294d6dcf24957ff6a4f2a1eaa706/novuwa.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/lutolakuguxunuwenuzebovi.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/22997768997.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/a2e57595d2b1d18140460471b65d08fb/94264355986.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/lurilopepulezapaxogakak.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/7672i1eogb4tmvbl9bj2e1581p/gozepafamuxiwi.pdfIn PDF document text
    • http://hodori247.com/uploads/files/4870491008.pdfIn PDF document text
    • http://adveotec.com/img/file/98836968989.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/zegokijitafosomoxufol.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/vupegelik.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/57211425487.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/71007947356.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/zunimatorum.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/64094354652.pdfIn PDF document text
    • http://graham1978.com/clients/79565/File/8730098588.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/6b5e69d9968b8f3296e23c48ea1fa861/5581108036.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/besatefebawulo.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/mafemorusudazuremamaxaril.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4056234ba---83290302263.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_off00011577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11577 20576 bytes
SHA-256: d17813037d3bf1b9dd5f7833b5a7e5f67512580b8aa3c25a455b8a09869e005c
font_01_sfnt_off00014ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE7 11032 bytes
SHA-256: 6beaea88a8aff67fe823521a38260fc8114a553b24e3c7824677aacd1888bf3f
font_02_sfnt_off00016416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16416 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1