PDF malware analysis — malicious · 2371409dfb6c12be

MALICIOUS

PDF

90.3 KB Created: 2021-08-17 08:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 3441605542585975c9a1de7070aaa2c8 SHA-1: 2ee0b9e99e6e3dc792c9cac6de617390548b07d3 SHA-256: 2371409dfb6c12bebdf9fa4648bacc969bbfcdd69b5e0c4eaa0b691307a50c30

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 a link farm pointing to compromised WordPress sites and other disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. The embedded URLs likely serve as lures to phishing pages or to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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://bdblue.com/ckfinder/userfiles/files/57126181629.pdf In PDF document text
- https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/a9942ff828b269024c815f6c23d4fcf7/57548982687.pdfIn PDF document text
- https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af960697495---7756116369.pdfIn PDF document text
- http://motocams.cz/ckfinder/userfiles/files/soterudola.pdfIn PDF document text
- https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a83aa67a53---logolosudebuvebuniwem.pdfIn PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6edec7c551---daxajufejimuw.pdfIn PDF document text
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/d5a71646d6301b0709173587f97b168f/33076536624.pdfIn PDF document text
- https://www.comperat-89.fr/ckfinder/userfiles/files/gajogofedijigidubopoji.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160746f2830c6f---xitifusuvavuni.pdfIn PDF document text
- http://litho-and-co.fr/ckeditor/upload/files/96065383620.pdfIn PDF document text
- https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607831afd0d09---tiwovijevavekov.pdfIn PDF document text
- https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/4c712438ad3066bcf1e01a8a42ddc8cc/23745864227.pdfIn PDF document text
- http://parkhighclassof60.com/clients/871169/File/wufenegajunerodim.pdfIn PDF document text
- https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/812761f4ce475b79441b0c5a5897d1a8/27703984564.pdfIn PDF document text
- http://foodchemsino.com/d/files/16887303002.pdfIn PDF document text
- https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/v00ir0vskvfas1n2fa2m32qfqm/39956484719.pdfIn PDF document text
- http://sewakendragroup.com/userfiles/file/nekutogosabixudup.pdfIn PDF document text
- http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16082b5a2c6256---fifimepipukazabibudepate.pdfIn PDF document text
- http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9bdb71052---xawosajafapunugimone.pdfIn PDF document text
- https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/elggqbee3m88qgtald9dli2b89/nulenogumizegelazojafok.pdfIn PDF document text
- https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/o3t8s3nqnc19i9a0pfh3h4j4ut/kelipone.pdfIn PDF document text
- http://capitaloffice.pl/fotki/file/soroxus.pdfIn PDF document text
- http://tele-klass.ru/i/upload/files/warexominumobezulopenakad.pdfIn PDF document text
- https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/bfdda7ca1ecc7b2dfb84251713689a88/48852077239.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/12a3ba909962c60eb7b7f676a225710c/xubifot.pdfIn PDF document text
- https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d80ce455a---92600611308.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=under+the+blood+red+sun+book+summaryPDF 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_off0000ff37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF37	10876 bytes
SHA-256: `d6e8cf806219ffcb9fbe3bf4219ab1e6a6dfe739d225a2aceaadc6e43671aca4`
`font_01_sfnt_off00011826.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11826	16704 bytes
SHA-256: `d9e73eaead7f993f199e9d187669abe4c671f4b30fab32bf9efa7b2234053216`
`font_02_sfnt_off000142f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142F7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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