PDF malware analysis — malicious · 00b6641a7d767d21

MALICIOUS

PDF

89.3 KB Created: 2021-07-17 04:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 8cfa93d1ee7a464b991e8c50bb74f465 SHA-1: f880fa2a7355add2169351391a61beba8beee231 SHA-256: 00b6641a7d767d21e2b117b9ca7d9613445fc681cec46f3346f46e7db467639e

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content. The presence of a fake invoice lure further supports a phishing or social engineering attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 7

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://gyandeepjkss.org/userfiles/file/64102002731.pdf In PDF document text
- http://lukoilmarine.com/ckfinder/userfiles/files/kijelulafozabidogudo.pdfIn PDF document text
- https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/b709a3bc413604b8c30117698f947a0b/bazuvudure.pdfIn PDF document text
- http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160de0f33a8840---kaxemifupadasanubijasis.pdfIn PDF document text
- https://webvitamin.vn/app/webroot/uploads/files/gizaj.pdfIn PDF document text
- https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/2bda27dd629c3d8663e7db9b1bf466ab/55720101987.pdfIn PDF document text
- https://eletvital.hu/uploads/files/ruzogikezeboxegaguf.pdfIn PDF document text
- http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160820cbc84b98---vugonubixadevew.pdfIn PDF document text
- https://autoprofi.ua/userfiles/file/20026206806.pdfIn PDF document text
- http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab864013a4c---gokomolufowofar.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/25a63b807c0a2c497a604c7fb09cbe07/momufikevozefaja.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aabe1b84e---57213001211.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/pc1a42cr3a64g8jcknovthkdrm/libunabudijejawis.pdfIn PDF document text
- https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/364f8f4274739cacfd98e0436833eaa3/69984967988.pdfIn PDF document text
- https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/e46b1950bc9ea40400c1ba1fe74faa97/33726003142.pdfIn PDF document text
- http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89b0332e24---63258722505.pdfIn PDF document text
- http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d96321c2b---gonuralavu.pdfIn PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/8993bee8df22246317324dd56f19b81a/76530117791.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/fbd825505583800f30ae8d111c2d902c/19521871928.pdfIn PDF document text
- http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160da026139621---podokesowop.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/77377650427.pdfIn PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/h9ej26n8jrgtvp4tu1bnlk7357/86442351371.pdfIn PDF document text
- http://retroldn.com/userfiles/file/32932112513.pdfIn PDF document text
- https://vannordenvastgoed.nl/userfiles/file/55330199631.pdfIn PDF document text
- https://proektasis.gr/admin/spaw2/uploads/files/5553844536.pdfIn PDF document text
- https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/trpdgfdnfh0cvs9eopb4qo24o6/warad.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=lifetime+gift+tax+exemptionPDF 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_off0000fc73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC73	16752 bytes
SHA-256: `390da3e132a8e3c3db6da70129e3fe8670c98741eb0ea23ab3aa4f425532f748`
`font_01_sfnt_off00012811.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12811	10448 bytes
SHA-256: `8633881361f19d82d5aa9686c87b4047d4b54d0935ff7f6849482f224d9cb778`
`font_02_sfnt_off00013fc6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13FC6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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