PDF malware analysis — malicious · 57580fc7af8e0919

MALICIOUS

PDF

73.5 KB Created: 2021-09-02 21:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 6d2abc66407274a711c5505a8e7cdaec SHA-1: da547efefa3316aa36a0a4cc3c0ddaab235c49c2 SHA-256: 57580fc7af8e0919bc4ae74647f873652bd6bfe01801382ea3a950aec765828d

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. This behavior is indicative of a link farm, likely used to manipulate search engine rankings or redirect users to malicious content. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

Nyx PDF Classifier malicious score 0.7114

Heuristics 4

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
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://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/c1e33b848da07eaa2ffe413486536a3b/66437046587.pdf In PDF document text
- http://babyshelter.net/assets/upload/files/58527133773.pdfIn PDF document text
- http://sbs-group.co/userfiles/files/32375499799.pdfIn PDF document text
- https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/ad7a967d71568d61aae7d7b24d81f63c/rodamedomagixupulevif.pdfIn PDF document text
- http://bigband-ulm.de/userfiles/files/62100562523.pdfIn PDF document text
- http://msnladyboy.com/ckfinder/userfiles/files/zekaxadukoxezopatewik.pdfIn PDF document text
- https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/30c4e9d9f4d3bf159a121fc5e881fcde/kizelezunisagosakomad.pdfIn PDF document text
- http://www.allatpatikapecs.hu/images/file/74710764064.pdfIn PDF document text
- https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/iu5j0etg1ag3nmvda3jl28g69r/8832689515.pdfIn PDF document text
- https://serpavenger.com/ckfinder/userfiles/files/kefilogetefedoxot.pdfIn PDF document text
- https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/ef03bcb0173d2680f7de56b648772d44/vizilopifabako.pdfIn PDF document text
- http://seoulsquare.com/userfiles/file/buwirasimoduvowarovivux.pdfIn PDF document text
- https://cicadit.ro/UserFiles/file/buwajumawemekotudi.pdfIn PDF document text
- http://ownlines.com/upfiles/file/tagenaduzini.pdfIn PDF document text
- https://comtraining.cl/userfiles/files/57881062327.pdfIn PDF document text
- https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/6d066a534efd55fd456ffdd58a16bfce/busijo.pdfIn PDF document text
- https://sca-kc.org/scauserfiles/files/66355642916.pdfIn PDF document text
- http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16071f7500b100---gogene.pdfIn PDF document text
- https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/ec3acc9e617529e5137d1282f9d768c5/wifivilosojakefinilupo.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b417167c6df---38516261748.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b00ba8a2a03---wuwewoxunosevuta.pdfIn PDF document text
- https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/ecc29de473052fc53ab573f8de2aae31/13116619536.pdfIn PDF document text
- https://fond.ru/userfiles/file/77613401017.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e594bbddae---rikiwakamotikomuju.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=psychological+trauma+thesis+pdfPDF link annotation
- 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_off0000cb3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB3B	16320 bytes
SHA-256: `83d404dd1f4ea7449e9f454cb1f5a316d9d99d2b980f74bb8ec5119287048555`
`font_01_sfnt_off0000f5a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5A6	11180 bytes
SHA-256: `6fc2e604c8e493879f248dfa9fe423be6ed9bd47353ef83e21ffbc4ef8e79d45`
`font_02_sfnt_off00010fae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FAE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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