PDF malware analysis — malicious · bfe949c85a9aa71d

MALICIOUS

PDF

79.4 KB Created: 2021-09-06 22:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: cbe5b42825ffff1a50c0317f33f93cde SHA-1: a456832d1888841a7e12566831094d6dd1643a73 SHA-256: bfe949c85a9aa71d1bc24e6c5df39bfb89b3fc876556e36ae935d98cd189f2a3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to potentially harmful content or downloads. The presence of these links and the nature of the hosting (compromised WordPress uploads) strongly suggest a phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9844

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://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078291398873---xejixitutoseluwajese.pdf In PDF document text
- https://sailstudy.in/ckfinder/userfiles/files/96031360440.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160929c0caaca5---goximokitazirelufazujer.pdfIn PDF document text
- https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16082de86424b6---35406030915.pdfIn PDF document text
- http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/wuzadawawidenukej.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b07552e8a7---33897395612.pdfIn PDF document text
- http://vividconcept.in/userfiles/file/40362388047.pdfIn PDF document text
- https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/0ppelro6jqmndsmpsg3j48dvaa/gibitixamivefuwefabidak.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703a8dbdb59---mapabaxozotigenote.pdfIn PDF document text
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8b70e4052---tidabogokewarora.pdfIn PDF document text
- http://systemsbiology.at/uploads/assets/file/18825732311.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/bb075eef6c2f57ba946da2d3ff142e41/87196967756.pdfIn PDF document text
- http://botosani.ro/img/uploads/file/kosolupepanevometor.pdfIn PDF document text
- http://rigdrilling.org/userfiles/file/veduzenesilapusirivuwewa.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b18be973a6a---bazomafulegiz.pdfIn PDF document text
- https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/q8te1cs2c86k5vksoqibbm51ff/mamitumatub.pdfIn PDF document text
- https://rosycaffe.com/file/33712533272.pdfIn PDF document text
- https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/tm2ktkto1iktn4hevsgtcuutor/21682709834.pdfIn PDF document text
- http://www.css-jp.com/upfile/files/2021/08/10/zusufadafujewaramo.pdfIn PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/8f907a789aabb4dd6862edb5cd3edd88/50064363575.pdfIn PDF document text
- http://youandisagenix.com/ckfinder/userfiles/files/bimarituxusojovefupidowi.pdfIn PDF document text
- https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a559fb133d7---63876175148.pdfIn PDF document text
- http://photo-preiss.com/upload_files/files/fobemodezakixorubepifudi.pdfIn PDF document text
- https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/nf5rifmuir38l8n489gi7h6frk/78775293073.pdfIn PDF document text
- https://cgeminfos.ma/upload/file/gezowizozanijevusox.pdfIn PDF document text
- https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160759e6bd737f---disoxup.pdfIn PDF document text
- http://conomiya.com/images/uploadedimages/file/zitaxo.pdfIn PDF document text
- http://cortabellanews.com/userimages/17592116580.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=texas+holdem+reglas+pdfPDF 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_off0000d344.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD344	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000eb56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB56	17184 bytes
SHA-256: `61bb0c8a4ba5a1f2e3d3b93912c374ddf6a250e37ab6b94038b69c9db323c05a`
`font_02_sfnt_off0001178a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1178A	10716 bytes
SHA-256: `8cf324a45deee405e35a8f8e555889b6d72375d8bad6653225872925c3ee1a2d`

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