PDF malware analysis — malicious · 0077c6fee1377def

MALICIOUS

PDF

83.2 KB Created: 2021-09-03 02:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 2c5378ba46006f05106412dec26541f5 SHA-1: cf981b101ed0f8c97476b9174b7f72c3d7fa75c0 SHA-256: 0077c6fee1377def70d03e9c89ab86d3275c96c6a899d700cc671dbb15f8fed2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1055 Process Injection

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malware or redirect users to phishing pages. The presence of multiple unknown URLs indicates a broad distribution effort.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700af17f246---busalawi.pdf In PDF document text
- http://hyundaiokla.com/uploads/files/37709736409.pdfIn PDF document text
- https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/2aeec4c4398d9214f90d4ec01adf1689/8963750865.pdfIn PDF document text
- https://akamercedes.com/images/uploads/files/35213836338.pdfIn PDF document text
- http://dijladentalcenter-qa.com/userfiles/file/kisipunamab.pdfIn PDF document text
- https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/8b7bce99aab86ec59c5a6105c3f05ad4/gudikugejiganoguwire.pdfIn PDF document text
- http://lamorenj.com/userfiles/files/taxilepuso.pdfIn PDF document text
- http://didaconcept.com/admin/fckeditor/file/58306042397.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16109744d2afd4---83230033369.pdfIn PDF document text
- http://baovethanglongmb.com/upload/files/vonabob.pdfIn PDF document text
- https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/9cdcfe6317ca91bd14b47ad8dfc73434/nuramuw.pdfIn PDF document text
- https://alexandrapanayotou.com/web/images/static/file/jigakuv.pdfIn PDF document text
- https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/fff245387c80c7d071a991874ead3e03/74434039168.pdfIn PDF document text
- https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae81d7669ad---nudixol.pdfIn PDF document text
- http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bf5f46cce---88976923286.pdfIn PDF document text
- https://solucionesinmobiliariasavg.com/ckfinder/userfiles/files/goxomemijemetivadakijuba.pdfIn PDF document text
- http://szkolka-wiercioch.pl/files/file/rubopijivifapidaronujew.pdfIn PDF document text
- https://micro-churches.net/uploads/file/kubapedejasimuxumegakare.pdfIn PDF document text
- http://coffee33.ru/archive/file/fofepuloxerafegijejonodu.pdfIn PDF document text
- http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/deeeff5a01fd1524024e19d9b3adb523/3100134622.pdfIn PDF document text
- https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/aca2c6e869ea6ef2c6ab03418c80efce/kadukovinisajekurisapule.pdfIn PDF document text
- http://venusland.vn/app/webroot/img/files/nibofovim.pdfIn PDF document text
- http://grandchainfamilyfoundation.org/clients/85333/File/95765764442.pdfIn PDF document text
- http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083afcb305a1---natugitonixuvosizega.pdfIn PDF document text
- http://meetburgerusa.com/uploads/files/besopixe.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=controle+sur+la+guerre+froide+3eme+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_off0000dbc8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBC8	11144 bytes
SHA-256: `90c6b66ffb004f0802b39662748c7aadfc3d838a4aeec48e683525106ce27683`
`font_01_sfnt_off0000f5a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5A9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010dbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DBB	18964 bytes
SHA-256: `a8dcb0c33ecb4e8b964494108c38c9cd40a671c6f068d55f360b52a951eb4c30`

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