PDF malware analysis — malicious · a8fe3f8029cd0ece

MALICIOUS

PDF

88.2 KB Created: 2021-07-03 13:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 04f8cedfc7221fb654b8af897e7fbd8b SHA-1: 77bf78c761711d96dbbb8c72f1c0f7729f5271c0 SHA-256: a8fe3f8029cd0eceb0e03552d14f462326749c909dec198c35cc0efe2c9b8ddf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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://coretry.ru/uplcv?utm_term=without+feeling+synonym PDF link annotation
- http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951a5992f0a---30420723643.pdfIn PDF document text
- http://skiflogistics.ru/userfiles/file/gupivoxadazu.pdfIn PDF document text
- https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd5684b881---lemovadef.pdfIn PDF document text
- https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/9hhdqe82bc3to5je0huvjr0ob6/werifenemipizamu.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bac2f3646---46731126243.pdfIn PDF document text
- https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/e6e682a49ffc79019b0bdc8cd0833781/16690685433.pdfIn PDF document text
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/dr5m4vcvfmcgtsd6fmokpcbeqm/395244681.pdfIn PDF document text
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df46a054572---xevofofex.pdfIn PDF document text
- https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ce84ee66b7d---77613139443.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087757001867---polomuwewaber.pdfIn PDF document text
- https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/0e304ea24d95c1733f953ff4c0c139cd/wefapujefexebijelajabub.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4a0a7e8e8---sijujotabufidus.pdfIn PDF document text
- https://zohopinler.com/calisma2/files/uploads/xuduxower.pdfIn PDF document text
- http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/e8182bbe2f82d6eaa8554f4acf2c3768/taxetafelomixeji.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/bc44d10df48e1970e73220c7705235fb/gotimevitigo.pdfIn PDF document text
- http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c7d3297cb---92528520581.pdfIn PDF document text
- https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/6epvbh2dvk2a7q9mtn7703isv8/29277654700.pdfIn PDF document text
- http://thebrownsfamilyreunion2008.com/clients/81208/File/dobiginuxamozumoka.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/kepedufima.pdfIn PDF document text
- https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/abc02e762dcbaa502611f761c40bfbea/26015475516.pdfIn PDF document text
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160700fe25c977---61666545527.pdfIn PDF document text
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/f47d946520e40a248edab65e0d948e62/28610220141.pdfIn PDF document text
- https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0c4161538458e5d9e892e294bb7a5e82/96729815347.pdfIn PDF document text
- http://wsp.pl/userfiles/file/bejilavovi.pdfIn PDF document text
- https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607935c2ba4a3---57277219139.pdfIn PDF document text
- https://artasedanasingaraja.com/uploadfck/file/61248091073.pdfIn PDF document text
- https://irantruck.ir/data/file/zuvopageto.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_off0000f5ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5EE	10608 bytes
SHA-256: `6b6e25e9acc404e57d1535789dbf61bb944648eecac5adbe50a74348d75b0bab`
`font_01_sfnt_off00010e06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E06	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012618.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12618	17464 bytes
SHA-256: `05874fa4cc61228026f9ee8ed6377fa97db328a1c5e843e387fe60b77d972c1f`

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