PDF malware analysis — malicious · a132e2be75fe6f2e

MALICIOUS

PDF

104.4 KB Created: 2021-07-04 15:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 3aca6e952e1d861d69250fed6a78f293 SHA-1: ada3b4d941cb549eb0773986e983ce6c41f65824 SHA-256: a132e2be75fe6f2e05b3cdab843aedb51b2737352449c6497c4e4a5fc92a03f4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the link farm nature is a clear indicator of a malicious attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

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://huntic.ru/uplcv?utm_term=linear+equations+in+two+variables+examples+with+answers+pdf PDF link annotation
- https://global-product.org/CKEdit/upload/files/54669640086.pdfIn PDF document text
- http://fitviewer.de/files/file/xuvasadadomug.pdfIn PDF document text
- http://n-production.com/upload/fckeditor/file/nevijokoredexatu.pdfIn PDF document text
- https://7gking.tw/upload/files/82769042598.pdfIn PDF document text
- http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/hhksfkh608ucl7vcic38hppsv0/3222648857.pdfIn PDF document text
- https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9a72263e5---51124590988.pdfIn PDF document text
- http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076ab8d96204---33594418676.pdfIn PDF document text
- http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16086f0a9303e4---kidisegobovikupimixifutis.pdfIn PDF document text
- https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/e15c16e7d716e25614c2ade7bb87c30f/nuwogodapimuxatedebobo.pdfIn PDF document text
- http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9134bee4c---27401857004.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a429a23b68a---5157060588.pdfIn PDF document text
- https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/d1f917776127343150aa7a1f2d04b0e5/nakefukapulotefojekuk.pdfIn PDF document text
- https://dm288.rs/slicice/file/poxutinozawapotolom.pdfIn PDF document text
- http://notarbrazda.cz/userfiles/file/6072948272.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/a3f401e51138ac76003b29ae7453eabf/17882954743.pdfIn PDF document text
- http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751476cac49---29106517595.pdfIn PDF document text
- http://angelcabrera.com/FCKfiles/file/botolufu.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cad9eec4c---lilugu.pdfIn PDF document text
- https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/be588b2637c8e3e2e71945da98350c32/37309944445.pdfIn PDF document text
- http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c67dd55cf---mebibo.pdfIn PDF document text
- http://utuin.net/files/fckeditor/file/7947143743.pdfIn PDF document text
- https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/0a8b8c885eef2d01b419664361832731/tamudeli.pdfIn PDF document text
- https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/cda8dfa7d0457de7a9ae97b2ae0e0af4/89058200492.pdfIn PDF document text
- http://activesolutionelectric.com/images/file/57777776212.pdfIn PDF document text
- http://canhtoanland.com/upload/files/sivodedemik.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_off0001336a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1336A	17492 bytes
SHA-256: `4b29bd3596693357f5c74d3f1cb963759dd67bc2b03a6be8ed2b7c5b0960efef`
`font_01_sfnt_off00016171.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16171	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00017988.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17988	11360 bytes
SHA-256: `ff3f0549533d23ac447f9fe28bc1bbc272fc0b43291e62ade6be6c5562daac42`

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