PDF malware analysis — malicious · b965ebb367facfe9

MALICIOUS

PDF

90.2 KB Created: 2021-06-29 19:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 2c4fe9ef54c75c38e7bf971d95e4f7b1 SHA-1: cf09a265d5d45102f7a980e7ac508e3f341663c4 SHA-256: b965ebb367facfe9720c88b1119da5bb82ff1604ad88666e584b129d4101db78

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating phishing and trojan behavior. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

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 https://chcial.ru/uplcv?utm_term=thumbs+up+elbows+back+knees+together+lyrics PDF link annotation
- https://appfacile.it/file/27729570096.pdfIn PDF document text
- http://www.cafeinca.com/img/public/contenido/file/42119281889.pdfIn PDF document text
- https://area34.info/wp-content/plugins/super-forms/uploads/php/files/e7m2c9m2c7vqv8aiche13oueb1/xekoruden.pdfIn PDF document text
- http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f3c384a79---kesekitokujenebov.pdfIn PDF document text
- https://badrivishal.com/media/92853645850.pdfIn PDF document text
- https://avgdesign.com/userfiles/file/83322939190.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18f0570d2e---vudixu.pdfIn PDF document text
- http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/tnsp68smkbpc8ob7q6d715fr6c/zelijolazigosevomezezuros.pdfIn PDF document text
- https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/rvc996i3fak3c8vnts7guuispr/36025510630.pdfIn PDF document text
- https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/d244ee57cc92be9eaaad43ed82554db3/fudezejitifimebitoxegapu.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/7e3dd913d2c540415c3474fa03b72c11/jivafebafo.pdfIn PDF document text
- http://piazzademarini3ge.com/userfiles/files/8446965531.pdfIn PDF document text
- http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/pigalidiloguvegovadiwub.pdfIn PDF document text
- http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a72db655fc---60072249503.pdfIn PDF document text
- https://autoandtruckrepair.net/nbloom/fckuploads/file/vonipon.pdfIn PDF document text
- https://pjkconstruction.ca/images/file/39724357340.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf7110c0bb---62534886866.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a033d4a1c56---kunutajuvogumuw.pdfIn PDF document text
- http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8f0c004f3---28268030034.pdfIn PDF document text
- http://www.deco-interieure.com/userfiles/file/8962840640.pdfIn PDF document text
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c885a897e8f---58075106137.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4978d27b1f---kuxufodudapaxobipis.pdfIn PDF document text
- http://www.darvidproperty.com/news/file/fulevodef.pdfIn PDF document text
- http://nowyhotelik.pl/userfiles/file/nuvajajiki.pdfIn PDF document text
- https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160983c5a6664d---7412325148.pdfIn PDF document text
- http://hzjksj.com/images/upload/File/5816951215.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_off0000fbf2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBF2	11316 bytes
SHA-256: `7ce07c1b08b49caeff85805223023041f184d7ed1acf6c33206ba2a9e0944bda`
`font_01_sfnt_off00011639.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11639	17192 bytes
SHA-256: `175b357016ea31f777de2303c251ef7fe7cb22a837425df0cff35098578c09c2`
`font_02_sfnt_off000142f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142F9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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