PDF malware analysis — malicious · 2b944b5f17b8cd6e

MALICIOUS

PDF

76.2 KB Created: 2021-09-19 02:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 8d8b486edf9facf2facbc20185cd1537 SHA-1: 999b9af6ea9e5305905725d9e3cc665f0033008f SHA-256: 2b944b5f17b8cd6e4a2f9484ad0bfb6221ba010bc08c77920c2291ce886a5777

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress upload directories or disposable hosting. The heuristic firings indicate a link farm designed to direct users to potentially malicious content. The embedded JavaScript likely facilitates the redirection or further exploitation, contributing to a phishing or malware distribution attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://veszpremlizards.hu/_user/file/zurogiremobibadew.pdf In PDF document text
- http://fecirturizm.com/resimler/files/nirevewegaxofiniraxituz.pdfIn PDF document text
- http://pfollowers.com/ci/userfiles/files/8486495402.pdfIn PDF document text
- http://georgewongdesign.com/gwd/upload/files/21429390418.pdfIn PDF document text
- https://gitedu.in/ckfinder/userfiles/files/89551474585.pdfIn PDF document text
- http://fuguchair.com/upfolder/e/files/20210906022821.pdfIn PDF document text
- https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613eeb4d7b93a---82226622268.pdfIn PDF document text
- http://mdbim.pl/ubezpiecz/obrazy/file/kijilasilizagurovuzepa.pdfIn PDF document text
- http://qazaqbanki.kz/data/content/files/bukapawetovirok.pdfIn PDF document text
- https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/jizaxez.pdfIn PDF document text
- https://valgott.com/images/userfiles/file/jebefapezeguped.pdfIn PDF document text
- http://jsdarvin.com/files/11719359467.pdfIn PDF document text
- http://spellenindex.nl/images/uploads/79717424422.pdfIn PDF document text
- https://satbietthu.com/luutru/files/10394048617.pdfIn PDF document text
- http://bassonconsulting.mc/userfiles/file/noxidepojujupimezenu.pdfIn PDF document text
- https://landbondcorten.com/attachment/file/02d3b0d91aae477f5506cc10cfc799fe.pdfIn PDF document text
- http://ameshamagazine.com/js/upload/files/60473390362.pdfIn PDF document text
- http://chikatere.com/Upload/files/zuvadagivife.pdfIn PDF document text
- https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130053e185dd---98694325196.pdfIn PDF document text
- https://ostrichpharmaceuticals.com/userfiles/file/jogatawagimebi.pdfIn PDF document text
- http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd3e0edacd---1747768542.pdfIn PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/040gfl9mcgh7q3n36f5ep0a8i2/60261967765.pdfIn PDF document text
- http://ruiqingchem.com/upload/files/rovuvoxosukobaja.pdfIn PDF document text
- http://aloisiquadri.it/userfiles/files/xorigedakonuz.pdfIn PDF document text
- http://studiocariola.com/userfiles/files/92963288535.pdfIn PDF document text
- http://www.kowel.com/ckfinder/userfiles/files/1630705502.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=upper+intermediate+market+leader+answer+keyPDF 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_off0000c3fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC3FD	10732 bytes
SHA-256: `f10a071859cb97169392d39290e2435628a0bc349f7fc9762caf8faf5364b05d`
`font_01_sfnt_off0000dcaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCAA	17772 bytes
SHA-256: `4577af920dee2bf7a61e45122d6a7714ef85a75e748c1dfe697329b80c3f7276`
`font_02_sfnt_off00010ae1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AE1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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