PDF malware analysis — malicious · 9b5bff0ef6cc09f1

MALICIOUS

PDF

86.2 KB Created: 2021-07-04 14:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 2582ac17530529ce4a1af2c889dba735 SHA-1: e51621126e51648e7e916ce7e26f4efefef546fc SHA-256: 9b5bff0ef6cc09f1ccb907b4e911d02762eb27078b0a9f144211e583f56d779c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous PDF files hosted on various domains, many of which appear to be compromised or disposable. This suggests a phishing or malware distribution campaign where the initial PDF acts as a lure to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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 http://cambridgekapurthala.com/damana/userfiles/file/51283767336.pdf In PDF document text
- http://reversetheclocknow.com/ckfinder/userfiles/files/tekutaj.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160776792e09d6---91431061437.pdfIn PDF document text
- https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/b052d915636d4be9dfe9056efb0b9c6f/88224041424.pdfIn PDF document text
- http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/653a7583c4c0a1a7b6510a0b241883bc/79766320354.pdfIn PDF document text
- http://khodahoanglang.com/admin/webroot/upload/image/files/73447590998.pdfIn PDF document text
- https://ewastexperts.com/userfiles/files/11567448215.pdfIn PDF document text
- https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/c2b7f8dd8c44e162e411f6b94ca2046f/jivor.pdfIn PDF document text
- http://inwallendorf.de/userfiles/file/lumoma.pdfIn PDF document text
- http://katachizu.com/img/news/files/67714777706.pdfIn PDF document text
- http://www.psoealora.es/ckfinder/userfiles/files/68153698997.pdfIn PDF document text
- https://gilbertems.com/videos/file/xomobekovukasejorod.pdfIn PDF document text
- http://rghsalumni.com/clients/82979/File/widizemotupakegotot.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608035c4b21cf---35178014346.pdfIn PDF document text
- http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2b0f1b5a0---bepedipoxugomevawe.pdfIn PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743a373cc77---wulaxifekiruri.pdfIn PDF document text
- http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080c50cb97bc---kububomisujumat.pdfIn PDF document text
- https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/kssuqmm9d7sv0glk90o1uv69g3/zekateluxuvaburazajonu.pdfIn PDF document text
- https://paperland.bg/uploads/file/9846612722.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd781efccc---bigilelopokif.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720931a69c5---juvofurowujojikige.pdfIn PDF document text
- http://bronia.org/userfiles/file/navuronuzimapimeborolez.pdfIn PDF document text
- https://ascinfratech.com/clientprojects/trading/file/xewupomuzomofabaxore.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/c9akh20o9g3j3o230pre4v9s1i/92999321484.pdfIn PDF document text
- https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c7d0eb724---berajapigedifagubedug.pdfIn PDF document text
- http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607822cb89cfc---86533994663.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ada1535d1f4---59189395821.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+position+time+graph+for+a+particle+moving+along+x+axisPDF 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_off0000ea7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA7F	17860 bytes
SHA-256: `f6c0e230cb27092835525d59c7485e899af671e5392e047717b982e1af79490d`
`font_01_sfnt_off000118f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118F1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013108.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13108	11060 bytes
SHA-256: `dd6d7980378fb5a4eb894ce319df9e1b466aee29f30820ff1676bac86dd23797`

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