PDF malware analysis — malicious · 8d95979dfbcb711e

MALICIOUS

PDF

94.8 KB Created: 2021-07-06 04:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 44f745c0bdcaacebc1c218f6fb18422f SHA-1: 30742331d27a5bbe1135c400c6f5def1bce4b482 SHA-256: 8d95979dfbcb711e9ed8ecf85d34ed57dbc4a0b63904a907461cdab183e4203f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting it is part of a link farm designed to redirect users to malicious sites. The presence of embedded JavaScript, though not fully detailed, further supports its role in a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9806

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://catamma.ru/uplcv?utm_term=pit+bull+terrier+chihuahua+mix PDF link annotation
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/feee1e889fe4043bf6205d65ccbec342/25479954116.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080e07aceb2e---80931594562.pdfIn PDF document text
- https://oliogalanis.com/file/gekijekexusuzibizorezezur.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/7da7809b464e87d898e62e072562fd2c/desob.pdfIn PDF document text
- https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e060756c47---71027935260.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/72c188ff46b744294b776a30559f3d91/nijelileda.pdfIn PDF document text
- https://primer-spb.ru/files/files/92850247301.pdfIn PDF document text
- https://mangonebike.com/uploads/file/rixesu.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609845bfeb06d---8571232958.pdfIn PDF document text
- http://benthanhsgfarm.com/images/uploads/files/2509456258.pdfIn PDF document text
- http://chnli.tw/CKEdit/upload/files/56868128043.pdfIn PDF document text
- http://bscartridge.com/pic/78142251568.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d010da56ce---83531631481.pdfIn PDF document text
- http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbc1c5c523---nirax.pdfIn PDF document text
- http://safeabortionnepal.com/userfiles/file/nefepimisamupa.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/95c5900d4836a48d084d64f9652cc699/bujebenuselumukinepor.pdfIn PDF document text
- https://aldapa.eus/files/galeria/files/17457129454.pdfIn PDF document text
- http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609aacc04baee---11322911408.pdfIn PDF document text
- https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/fa9148744425e8c01106217a8b18f80e/buxixokasodilij.pdfIn PDF document text
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2r1aoif36mq85ktloml919nih2/sepol.pdfIn PDF document text
- http://douzonebnf.com/upload/file///64937749027.pdfIn PDF document text
- https://sealskinz.ru/files/file/fozipepetikifib.pdfIn PDF document text
- http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fc6135349---gorosetikofedifari.pdfIn PDF document text
- https://promise-land.com/upload/file/89622695916.pdfIn PDF document text
- http://abpaluso.com/upload/file/34197666899.pdfIn PDF document text
- https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/03d28d2bf24c90531e92b6bcae4c9ccb/vogumonogiraxu.pdfIn PDF document text
- http://fcv-bo.org/data/fcv-bo/userfiles/file/sezitedinivarijokugezexix.pdfIn PDF document text
- http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160841acc71baf---jegin.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_off00011193.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11193	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000129aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129AA	10444 bytes
SHA-256: `1f4a502846174df5cbfa452f48ef40af0f889d3a63beadbfd2d5a746d970bb3e`
`font_02_sfnt_off00014156.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14156	16940 bytes
SHA-256: `69831838fb63d51abdb4375accb646c351b0e85c8ff795077599a591441eddc6`

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