PDF malware analysis — malicious · f61a9cf19263b183

MALICIOUS

PDF

84.3 KB Created: 2021-08-21 01:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 7ee2cae0065588fe356af3c2ea78ba4b SHA-1: f12bc1a4a78d721a55145ad90e9e96a8c3b45308 SHA-256: f61a9cf19263b18396c52a32efda12c44821eaef84b6d2ca8ec3252239ca0f2b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further supports the malicious nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 https://philabc.ru/uplcv?utm_term=logic+pro+crackeado PDF link annotation
- https://tectrongim.com/uploads/files/88900679082.pdfIn PDF document text
- http://datev.hu/ckfinder/userfiles/files/tegugav.pdfIn PDF document text
- http://kpotplace.com/uploads/files/dafowutatixapanibedenaseb.pdfIn PDF document text
- https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/501ab621bf2b624956239261abae2a4f/gajak.pdfIn PDF document text
- http://www.advokat.com/app/webroot/img/fck/file/pivagisavejegukabovu.pdfIn PDF document text
- https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/d25727bc40bf29054fc038eb53fa4398/zelajarujogunabanedov.pdfIn PDF document text
- http://armanetti.com/images/257208905.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b77813a389c---bezamesuwijuxa.pdfIn PDF document text
- https://landbondcorten.com/attachment/file/a4fdffe419168490de6c8b588503be05.pdfIn PDF document text
- https://bimetoor.com/basefile/bimetoorir/files/galudejigana.pdfIn PDF document text
- https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/65m6i0jadh36n53qq84i6h8c60/kivuzojupixozixeba.pdfIn PDF document text
- https://unibel.pl/pliki/upload/file/jikigezureliz.pdfIn PDF document text
- https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/08df76f0591a01073117529c8a196077/jenokubetedufikenevada.pdfIn PDF document text
- https://limsurdua.com/contents//files/tuzolovafiwolemidagasesaz.pdfIn PDF document text
- http://www.pilartangguh.com/file/26272075536.pdfIn PDF document text
- https://777mto.org/contents//files/gukadixexe.pdfIn PDF document text
- http://qianlong99.org/ckfinder/userfiles/files/kibigofapagoxera.pdfIn PDF document text
- http://diakmelo.hu/ckfinder/userfiles/files/kejakupopowexotefefajotu.pdfIn PDF document text
- http://www.pavimentosyreformasferlu.es/ckfinder/userfiles/files/jekupilirakijijiz.pdfIn PDF document text
- https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/2mq0fogav2nksa4kcraclqkagd/rumexan.pdfIn PDF document text
- http://mevlanaasm.com/resimler/files/tidovonojakadegewame.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a5d461039---67230280650.pdfIn PDF document text
- http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a34111eb75e---12698642879.pdfIn PDF document text
- http://ingenermarket.ru/userfiles/40605789786.pdfIn PDF document text
- http://zonweringnederland.com/ckfinder/userfiles/files/mofosirujodonun.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e878.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE878	17016 bytes
SHA-256: `eeed63989eab665d070808f74c15dfe76ba18a8a2f5e641cefb9021e4d06351f`
`font_01_sfnt_off00011511.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11511	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012d28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D28	10320 bytes
SHA-256: `b586018c9b085724c532adb61cf7d5967cf0aa33ce219d084cb9c545d85e78ef`

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