PDF malware analysis — malicious · 557e8ac6cc100de9

MALICIOUS

PDF

225.5 KB Created: 2021-07-08 06:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: bc7b0207241618e50ae90e73c4287410 SHA-1: fd130c89ccc1cf3741dec29e793fac154b7fa8e1 SHA-256: 557e8ac6cc100de969294705bb28e382ab9ba4970a6c2fd43ecaf09b1efcd754

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The 'Remote-support tool lure' heuristic strongly suggests the document's purpose is to trick the user into installing or running remote access software. The presence of numerous links to PDF files hosted on compromised CMS upload directories further supports a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9852

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
Remote-support tool lure high SE_REMOTE_SUPPORT_LURE

Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
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.
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://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/3pjnrnt2o2dvdfb410g90qa5bb/12368875475.pdf In PDF document text
- http://matras-devison.com/upload/file/52791817271.pdfIn PDF document text
- https://yssnewlessons.org/UserFilesTwo/file/wifogati.pdfIn PDF document text
- http://interwork.sk/userfiles/file/86220839266.pdfIn PDF document text
- https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6974e39f5---xanupesije.pdfIn PDF document text
- http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/dinapiliwaniw.pdfIn PDF document text
- https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/9rdt3tmhue4c3eog2kd995s9s7/83600751484.pdfIn PDF document text
- http://lucann.com/Upload/file/mapusidaw.pdfIn PDF document text
- https://arichaindia.com/userfiles/file/dakobabexanusakerawuxelab.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/toe33llin4vi8apcgtrgjqh5f0/pitowuxe.pdfIn PDF document text
- http://donelreunion.com/clients/5/59/59051ae02fa593b10ab13f41bf6316a1/File/jipebajodovuripixez.pdfIn PDF document text
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e1c600d67---gezusubatitileleb.pdfIn PDF document text
- https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/6aee2215e5ac9a07bfbcc147116fb975/nowibuv.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd680b0f0f3---79215690783.pdfIn PDF document text
- http://accomplishtheimpossible.com/userfiles_ati/file/durenon.pdfIn PDF document text
- http://evopizza.lt/ckfinder/userfiles/files/sawowawonewilozetu.pdfIn PDF document text
- http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16086830626a3d---lilufopakupuza.pdfIn PDF document text
- http://saxons99.com/clients/5/5f/5faa49e4155ddd0d4faf97b0d7aa3dde/File/26377994698.pdfIn PDF document text
- http://canadanur.com/resimler/files/wazezud.pdfIn PDF document text
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b543e9b19---5489173400.pdfIn PDF document text
- http://phuocthuan.vn/images/pic/file/bifegewugufud.pdfIn PDF document text
- http://boothbayharborshipyard.com/userfiles/file/vanabemataxidefogitov.pdfIn PDF document text
- https://theelementrama9.com/userfiles/files/xutezovilojerotizosagifew.pdfIn PDF document text
- http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/b6eb4303fc3de81d9df4b289ab39472d/lebetugurabavozabilatezab.pdfIn PDF document text
- http://jinistudy.com/_UploadFile/Images/file/99303410798.pdfIn PDF document text
- https://atcotourismtravel.com/userfiles/file/86461987594.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=mr+lonely+mp3+song+free+downloadPDF 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_off0003130a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3130A	20024 bytes
SHA-256: `844fa39404a750a9dba297d6328242eb810c46a648dd7e1f82e7a74d85afab7a`
`font_01_sfnt_off00034643.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x34643	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00035e5a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x35E5A	11016 bytes
SHA-256: `c886536e1028135e81d890471c1f5148070407d42584cf91296ac4127c3b7164`

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