PDF malware analysis — malicious · ec9f025f99e64fc4

MALICIOUS

PDF

81.3 KB Created: 2021-06-26 21:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: f9403c83da7b912a5cacedcf469e7192 SHA-1: 609353d59d6894030880bea1ff249c56d799eaa0 SHA-256: ec9f025f99e64fc41a4a4bb7f823c99dd914cd4b978cdd579b52dd6acedd84c8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9960

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://laborke.ru/uplcv?utm_term=type+of+car+by+vin PDF link annotation
- https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/84cc8eb7decb5fecfb756f36fa8a3f5b/9446789700.pdfIn PDF document text
- https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf5af21b0d---ruvojofoxusekoroxogikena.pdfIn PDF document text
- https://parklanehotel.asia/userfiles/file/18553585718.pdfIn PDF document text
- http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/87sfnmaolh8si6891l4gisbb67/7205918135.pdfIn PDF document text
- http://poltinik.ru/userfiles/file/bogabozixoxejotala.pdfIn PDF document text
- http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/68f54bddbf74d90ddbbf7a22e1bbdc20/majofigivaduveroregoluna.pdfIn PDF document text
- http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944e6c90ea9---judob.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f35dbe0c2ea248fb0326dae16e514803/rewafimomovofowitaneza.pdfIn PDF document text
- http://domeinbeverdonk.be/assets/files/file/64690249737.pdfIn PDF document text
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8420a8e20---webogijosemen.pdfIn PDF document text
- http://travellightnepal.com/userfiles/file/roremog.pdfIn PDF document text
- http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767f31ecf5f---37284116542.pdfIn PDF document text
- http://automozg.by/upload/editor/files/xagewoneniriromineziv.pdfIn PDF document text
- https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/bf8vhehoubhljg9lc2cfto7sb0/kolibivivunubi.pdfIn PDF document text
- https://grupahatak.pl/admin/_fck_files/file/jotegok.pdfIn PDF document text
- http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8e24aa08a---jofozolomipakusenufani.pdfIn PDF document text
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/g5mas4fkib6qbnmhjshrc8lahp/24533722553.pdfIn PDF document text
- https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/dc7e02ad7acaa38a748e42f015b7c7b0/2550369859.pdfIn PDF document text
- http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c486639a9---folagaxu.pdfIn PDF document text
- https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/2cd0f9612f57b167497bbbd8224d20f4/zapavifud.pdfIn PDF document text
- http://dotacjedlaoze.pl/userfiles/file/fapivexofikorotunoj.pdfIn PDF document text
- https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/c3b18dc1b2b90a71a01f4abca022141d/fifewatemubokudojukogiz.pdfIn PDF document text
- https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e20aeed528---vikafefeduvuvumu.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_off0000dc4a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC4A	10444 bytes
SHA-256: `22066157b2c7511e58b04ad9689f61e0eb0f98a9e4fdfa25d2f5f8780ad5e5d8`
`font_01_sfnt_off0000f3ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3EC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010bfe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BFE	16944 bytes
SHA-256: `4e560ea6895da22a2932a695464b25adab4902735e9108bca6174d57116a3d6a`

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