PDF malware analysis — malicious · 62364a19e476271b

MALICIOUS

PDF

85.9 KB Created: 2021-06-25 19:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: a27051f80d924b59af830a234ad4c2bb SHA-1: 6530729cb06ce15393f3d053ece36da32f78ace9 SHA-256: 62364a19e476271b437f75cfc91ef539051761ff47ab553ac2348d2445d90b25

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links pointing to potentially compromised websites, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

Heuristics 6

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.
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 http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/d6720rn2suulc5d591nkj2ue92/29826070238.pdf In PDF document text
- https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/jame3f1ceappisslao8c61819l/wefonedudelevasimisediboj.pdfIn PDF document text
- https://peilimineko.com/userfiles/file/xekofuval.pdfIn PDF document text
- https://stillwaiting.org/userfiles/file/derokoz.pdfIn PDF document text
- https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/656c3d50a42a698615f7d00c398f87a8/xuxejawobaxizanabibom.pdfIn PDF document text
- http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b6c1dff29---47565782923.pdfIn PDF document text
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e326cbacfe---53218111293.pdfIn PDF document text
- https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/661519af6008c44510dae2914f402873/mejukima.pdfIn PDF document text
- https://alutat.com/data/file/3377916301.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac041a744e---23038695523.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160766c7489f86---55232725071.pdfIn PDF document text
- https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/63d17bc704aa2f64a5fb9afda461cb2b/13404051572.pdfIn PDF document text
- http://doktor-okonski.pl/uploadimg/file/zuwigelixadexajikenokas.pdfIn PDF document text
- http://asdgolfclubtoscana.com/writable/public/userfiles/file/potituvutexu.pdfIn PDF document text
- http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/sidufevewojufetesapoz.pdfIn PDF document text
- https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/533b1ff4d95f677259b9252426999ead/mokedugawubibetuz.pdfIn PDF document text
- https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/59b25547c6cc252a979a6c72f33ead40/96096190327.pdfIn PDF document text
- http://aggengr.com/uploads/CMS/file/jelelevidokumu.pdfIn PDF document text
- http://pphu-joanna.pl/fckpliki/file/70235817539.pdfIn PDF document text
- https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/f262f6346b16e59b5da2a6e5bef83a19/46934600374.pdfIn PDF document text
- http://sakaryakasaplarodasi.org/userfiles/file/99563591116.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e9b927ae---zimasakosiwirajuripulafas.pdfIn PDF document text
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac958e889d0---bifemawijomemowal.pdfIn PDF document text
- http://bronia.org/userfiles/file/64910556349.pdfIn PDF document text
- https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/a170e4ebc0d9d6ccebb4e6269c8fbacc/kotugonabudipi.pdfIn PDF document text
- http://stigstudiotecnico.it/userfiles/files/36354020621.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=all+joints+suddenly+hurtPDF 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_off0000edd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDD3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000105e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105E5	17040 bytes
SHA-256: `37bf8fc423361a4ac6ac1e6810ab5769610fefdda57c2d9c0a5f54fc3c19834a`
`font_02_sfnt_off00013270.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13270	10508 bytes
SHA-256: `351e99f7576628be16e13a1937f0108221d515175e4048750d7384bb92e0ef5d`

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