PDF malware analysis — malicious · bb40aeb9947c87fe

MALICIOUS

PDF

78.1 KB Created: 2021-06-26 02:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 54b872780c8a21ca25c33fe66e829a29 SHA-1: 7a7040c7592ce02771127d07c5640f41da9ba075 SHA-256: bb40aeb9947c87fe9e3a51fe1a8b66bfb2bc01caa9b6e504a4dd3a66170efa17

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms. These links likely serve as a link farm to distribute further malicious content, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3df0169c2---tuvurunifepavafaz.pdf In PDF document text
- https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/d8f9a9d11b5a722a5fbc33fdcc6e5793/sapasolakibavuf.pdfIn PDF document text
- https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/aba878a8ca7781f7bbb6088613cd371a/begasemajabozedof.pdfIn PDF document text
- https://chptravel.ir/data/file/basigewogisotuwimigepat.pdfIn PDF document text
- http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bee95c57d57---wulipopufemozobana.pdfIn PDF document text
- http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160861c201fb77---24359329679.pdfIn PDF document text
- https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/5f013314f8fa315024ecd06f5ad971df/76832479790.pdfIn PDF document text
- http://lexen.ca/userfiles/files/29682590481.pdfIn PDF document text
- https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0e225ded4---zebogewuwilogasajina.pdfIn PDF document text
- https://juraganmonyet.com/contents//files/guwerilakuripodalemokaluw.pdfIn PDF document text
- https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/431feba9bb7a1a3ba2775119e5816835/7215563254.pdfIn PDF document text
- https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/f8ac5be7f05ede43a79c0372e47aa942/dujoduvepebowuvegijo.pdfIn PDF document text
- http://sys-svinding.dk/userfiles/file/52404615224.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fae2e89937---sujapasalimetulofomo.pdfIn PDF document text
- http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/p98i0f8n8qp28dpdsa6ef7o83t/86605373323.pdfIn PDF document text
- http://aweibel.com/Photo/file/worojedujaxoxot.pdfIn PDF document text
- http://nfc-lampang.com/user_img/files/pexib.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f020fbc7a0---vesenuzesizegotuvomeb.pdfIn PDF document text
- http://creativeindustries.ru/uploads/userfiles/file/5353653323.pdfIn PDF document text
- https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/9efce8f97721680e7560ea9ee8451002/xodovodinamunazijovax.pdfIn PDF document text
- https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9357d163da---topisogok.pdfIn PDF document text
- http://www.annaleehuber.com/content_files/file/tuponukexob.pdfIn PDF document text
- http://fairway.cc/images/blog//file/wadaluvudob.pdfIn PDF document text
- http://opakowania-loga.pl/zdjecia/fotki/file/9647690978.pdfIn PDF document text
- https://weddingitaly.jp/images/file/51768007688.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=bsc+physics+honours+notes+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_off0000ce58.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE58	16776 bytes
SHA-256: `1426e39dc3757881e417c6130cd9fccd08377167b488683944c13476ac9d1a8c`
`font_01_sfnt_off0000fa27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA27	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001123e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1123E	10776 bytes
SHA-256: `9f8cb0d00603e35db84755a3273c93b0dfaa03f2f415f9e3f202ee75310f02d7`

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