PDF malware analysis — malicious · 82d258e57a938d6b

MALICIOUS

PDF

87.3 KB Created: 2021-07-04 07:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: b6d24b9c27282dff3a444d52faf7c19c SHA-1: d2cea3d9472a591eaef2a2ae14868ce547d81f57 SHA-256: 82d258e57a938d6b2d7c5d077c51f23be055ee17e6942a9e23f47025626208a7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a phishing or spamming campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads. The presence of multiple PDF-specific heuristics related to link farms and compromised uploads supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://agrilaui.com/userfiles/file/64291549945.pdf In PDF document text
- http://mynigaoe.com/upload/file/20210617021159.pdfIn PDF document text
- http://giga.sk/storage/file/99386085164.pdfIn PDF document text
- https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/6md7obt5higkbjtb351sc3ugh5/bebexebinulojajarevoso.pdfIn PDF document text
- http://euredit-editions.com/userfiles/file/11962278727.pdfIn PDF document text
- http://esoftland.com/userfiles/file/76315804508.pdfIn PDF document text
- https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/70bc21406835924c3f7712aeb79de1e8/68351481141.pdfIn PDF document text
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/f4983a99a6e50461f6c069c905a2d67b/77481181076.pdfIn PDF document text
- http://xn--2-140-swe8h.xn--p1ai/files/jugesadu.pdfIn PDF document text
- https://kp-bs.ru/upload/files/pemegidaso.pdfIn PDF document text
- http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16090ffae6374e---fufolikubuger.pdfIn PDF document text
- https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/08c940c74dd0f249094d1a6236275d97/bagebusamasetalekux.pdfIn PDF document text
- http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609675b92f842---7801964287.pdfIn PDF document text
- https://verandapattaya.com/userfiles/files/mixaxetiwamamagirofi.pdfIn PDF document text
- http://pratiklinik.com/img/userfiles/files/9271867736.pdfIn PDF document text
- http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951a95a004e---jisisow.pdfIn PDF document text
- http://bioaec.com/userfiles/files/xosifogepisixili.pdfIn PDF document text
- https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/7nlamne8t8s1oah5t0s82qlkgu/6336641465.pdfIn PDF document text
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609faea12c341---lipufuriguf.pdfIn PDF document text
- http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609002acd3078---65213679420.pdfIn PDF document text
- https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/72d09354d73dc1a12dba134c27d0b5f1/81308489852.pdfIn PDF document text
- http://www.psoealora.es/ckfinder/userfiles/files/5220852209.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb2d533d46---jutofedopimiwaxax.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb4ee05f60---mosetazopaz.pdfIn PDF document text
- https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/af2886b57a5c63e2c44f856349643027/89214495378.pdfIn PDF document text
- http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c063e817ba4---pujomabepumegi.pdfIn PDF document text
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c60dce12d1d---xowekifanef.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=a+bride+to+be+dare+to+be+differentPDF 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_off0000f308.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF308	10252 bytes
SHA-256: `7c9cd72ed83440fd1d2514f3aaebc23c4a993c31688f9f0bf514d6ca29675e05`
`font_01_sfnt_off00010a2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A2F	17120 bytes
SHA-256: `8635df3ee91c74fa2e219f7cea128e9929c47ac4068750e8f5adcc39cf13e1ef`
`font_02_sfnt_off00013616.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13616	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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