PDF malware analysis — malicious · 1ddbe5100b834f7d

MALICIOUS

PDF

76.7 KB Created: 2021-09-03 16:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: cb9e1b979b9572e07d495f0df0a94f18 SHA-1: 6dd5150eba9af883c5c4d1c2afd42957f83a4647 SHA-256: 1ddbe5100b834f7d642e604abecf8e9d05e7dc4aee39caeab6bc4a944dbba6b1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9827

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://oprandi.it/userfiles/files/74925723459.pdf In PDF document text
- http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611fe5cd58425---61158974305.pdfIn PDF document text
- https://aradovan.com/userfiles/file/68638040958.pdfIn PDF document text
- https://akproauto.net/nbloom/fckuploads/file/75120023944.pdfIn PDF document text
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/161235ac2e07b7---gulopugikiwepaxaxabut.pdfIn PDF document text
- https://htchninc.com/d/files/rifazixanewokazizavod.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/tndf4d9g12vmcf263sdr9h0p41/80000918565.pdfIn PDF document text
- https://hardlineconstruct.ro/app/webroot/files/userfiles/files/59979141507.pdfIn PDF document text
- http://cs-web-design.de/ablage/userfiles/files/zifuwoki.pdfIn PDF document text
- http://hykylalumni.org/userfiles/wirutuwesunurimewi.pdfIn PDF document text
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072128b1cd2c---livofarokevuxepopi.pdfIn PDF document text
- http://chromavials.com/d/files/xilixaloxotufanifunad.pdfIn PDF document text
- https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16118efaadfc42---kunebifapujarab.pdfIn PDF document text
- http://diysmart.net/userfiles/file/dinafamusisitimeginem.pdfIn PDF document text
- https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/e3b9ec1c823c713bb4427f5c282f492f/83606988373.pdfIn PDF document text
- https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/3t9fieh9jbkmif5kb6fmko48vp/lofusaxazuliboxixixobopa.pdfIn PDF document text
- http://arohitourandtravels.com/userfiles/file/81717861820.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/6008cf27b177b9295749b7261a63c9cb/lawatajureguv.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/a01b04c5d0cdabf6b0ad5ea52ed46944/dukabebuni.pdfIn PDF document text
- http://lineshare.net/upload/files/20210825162005.pdfIn PDF document text
- http://oryginalnedekoracje.pl/userfiles/file/davexinefawo.pdfIn PDF document text
- https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/6fc588f1e6d3fc69de9f3d1bedd40c59/mawidaxezukumenosam.pdfIn PDF document text
- http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/cb6ccefef7f7b5c256e6210b72dfe44d/bajozitomugigizemidetub.pdfIn PDF document text
- https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdeb87fef8---25507655714.pdfIn PDF document text
- https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/6dee310a8925d14597aec7063685e331/16055081563.pdfIn PDF document text
- https://marblobaths.ph/app/webroot/img/files/66403737072.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/0ad5d4f87b8d8b0bbf7aed41dd36d11c/58412070852.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=minutes+to+decimal+chart+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_off0000c8cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8CC	16924 bytes
SHA-256: `b50a60511598f9eccd9a302d65ecf2fa3332bc6a2659f166b586abf893fde3c8`
`font_01_sfnt_off0000f3e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3E5	10976 bytes
SHA-256: `2740f104c8a9b8b2521c714be75c0c71ee5a6fcb93f76d83fd1deaa611af0463`
`font_02_sfnt_off00010d22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D22	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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