PDF malware analysis — malicious · 60299a0ce4ddf923

MALICIOUS

PDF

94.9 KB Created: 2021-07-07 18:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16

MD5: b01b565e0990957963c8f4784f477dfb SHA-1: 8abd65075946cae4a2273e8b422a51b904150463 SHA-256: 60299a0ce4ddf923eb45406273e8c23ba1fce2ca458912baadabc9daa1d49692

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs that point to a variety of compromised websites, many of which appear to be WordPress installations with vulnerable plugins. The ML classifier strongly indicates maliciousness, and the structure suggests a link farm designed to redirect users to potentially harmful content. No scripts were extracted, but the presence of multiple external links indicates a likely attempt to lead users to phishing pages or download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9918

Heuristics 5

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://medvor.ru/uplcv?utm_term=what+does+hoto+mean+in+spanish PDF link annotation
- https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/103229f4f200203d22b89db6fdf5af9f/54554478447.pdfIn PDF document text
- http://gustosandvic.com/ckfinder/userfiles/files/togisig.pdfIn PDF document text
- https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/rgo0hedlljbf840bcgab92pce4/9153423206.pdfIn PDF document text
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094f3f5bf0fd---12431673088.pdfIn PDF document text
- http://a9188.com/upload_files/art_files/files/20210706_161753.pdfIn PDF document text
- http://from.ua/upload/articles/2021/06/16/files/pazigajinogi.pdfIn PDF document text
- http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/b8d7695cc829446c0e403199e606890e/wegeje.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/0cacf590bfcb9bb6b06f38a7a7bd7b4e/siwoxakododogedovafopofe.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ce44dd5233c---nezasewotepobejozo.pdfIn PDF document text
- https://bettyloupaints.com/userfiles/files/netarokemalukura.pdfIn PDF document text
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5f2104ef4---91134014542.pdfIn PDF document text
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d2754b6c2a3---41322109581.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075885def7e5---12050533302.pdfIn PDF document text
- http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/114381a69698df4c57d0fbd3b1028190/25168228404.pdfIn PDF document text
- http://fitviewer.biz/files/file/63061192803.pdfIn PDF document text
- https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/b81b07567d50f98c73e7a3c5486bf3e7/kuzagomugaf.pdfIn PDF document text
- https://legyenegyjonapod.hu/userfiles/files/linon.pdfIn PDF document text
- http://cuacuonductudong.com/upload/files/kivaxijawiwetuxo.pdfIn PDF document text
- https://cremyco.com/app/webroot/docs/file/88863573644.pdfIn PDF document text
- http://martom24.pl/martom/userfiles/file/tivewejixutozixero.pdfIn PDF document text
- http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763f0fcd365---tikipinuvolewan.pdfIn PDF document text
- http://bularz-auto.pl/images/userfiles/file/94706484015.pdfIn PDF document text
- https://sasalidayanisma.org/uploads/file/10805028176.pdfIn PDF document text
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/3c0793eb8306418e3837a9e47f09a21b/95570739699.pdfIn PDF document text
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/5e4591eb632b4240957384e627d6a370/gulegivaviluvaxiwug.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f422.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF422	16060 bytes
SHA-256: `8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825`
`font_01_sfnt_off00010931.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10931	20500 bytes
SHA-256: `d32fadc7358559100bd2628f929b1b956432cdb6ce4859ec44123c222162d284`
`font_02_sfnt_off00013e26.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E26	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0001563d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1563D	10504 bytes
SHA-256: `cf0a32d0608fffb1555f5e8d268343b63b83ba2e49f998cf1dc1df47ea812423`

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