PDF malware analysis — malicious · 8d2e361c56b4e9d7

MALICIOUS

PDF

79.9 KB Created: 2021-09-05 22:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 164574b26a53318a7466ae6867bf7c23 SHA-1: 7caa97610501e191f67c179d935a894cc409a918 SHA-256: 8d2e361c56b4e9d7096b9b728e7d355121861071d7df4f7c56c847acf78f9584

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The presence of these links indicates a likely initial access vector via spearphishing, leading to the execution of a malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b878d547259---1756066570.pdf In PDF document text
- http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/3089317522.pdfIn PDF document text
- https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/10291293b5df5679d41c5b1b8d578661/38959136585.pdfIn PDF document text
- http://vncanada.vn/uploads/files/defifajadesewalelemi.pdfIn PDF document text
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32fe48824d---11949033196.pdfIn PDF document text
- http://circuitvietnamcambodge.com/hinhanh/file/89993021585.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/591e371ac09f150141afb3ffa3ee5805/zopokopu.pdfIn PDF document text
- http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/1c1afc59c70092940cebd00727d52900/fasamebo.pdfIn PDF document text
- http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/8c7d9cf29f38246effaeee41eda615ab/83651172034.pdfIn PDF document text
- http://work4shop.cz/userfiles/file/panufize.pdfIn PDF document text
- https://kmkmekanik.com/upload/ckfinder/files/57315488419.pdfIn PDF document text
- http://zeci.nl/im/image/75126464992.pdfIn PDF document text
- https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/443257bbcfbe6087ca6f9c5633b946f5/meneruk.pdfIn PDF document text
- http://fzsvybbs.at/userfiles/file/pafujor.pdfIn PDF document text
- https://aawyx.com/sites/default/imageuser/file/dizedu.pdfIn PDF document text
- http://www.tahi.hu/ckfinder/userfiles/files/75353959397.pdfIn PDF document text
- http://alhouti.com/userfiles/file/pepuvosusegamoritizozegij.pdfIn PDF document text
- https://rh-h1tapi-turbo.com/contents//files/27736232218.pdfIn PDF document text
- http://avanti-kuhni.ru/upload/files/pivuporadolitaxuresadem.pdfIn PDF document text
- http://acecaalcoy.com/userfiles/file/dugajonodivekibi.pdfIn PDF document text
- https://rimsball.com/ckfinder/userfiles/files/88526764302.pdfIn PDF document text
- http://md-servicios.com/userfiles/file/tefumibabiwek.pdfIn PDF document text
- https://rybczewice.pl/userfiles/file/62389639322.pdfIn PDF document text
- http://semanbio.com/upload/files/13204637043.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=signering+af+pdf+dokumenterPDF 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_off0000d10b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD10B	10892 bytes
SHA-256: `721999a961420fde0d4a2b4256a26d4139ca50b5d4bdea37bed404d623ae9dda`
`font_01_sfnt_off0000ea08.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA08	18572 bytes
SHA-256: `5829960326e4e439b75d46b7f12947a6f3c101a1cdc5aa105c829f132640a5a0`
`font_02_sfnt_off000119f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119F4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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