PDF malware analysis — malicious · dfc2046d6ec467e5

MALICIOUS

PDF

81.2 KB Created: 2021-09-02 02:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 68e8b00fe7b47e48e1b322431578901c SHA-1: 84804ef01f7d3a8b32cadb6dcedf388f5e0711d2 SHA-256: dfc2046d6ec467e50587cc47a81e8d67b50d59c1924283c4aef53ac1b32e90ee

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many hosted on compromised WordPress sites, that likely serve as a link farm to distribute malware. The presence of 'utm_term=fortnite+launcher+exe+download' in one URL suggests a lure to trick users into downloading a fake game launcher, which is a common phishing tactic.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

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.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081493b5d3a9---5138049534.pdf In PDF document text
- http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc57eaabf8---57277851847.pdfIn PDF document text
- http://accessiblevehicleservices.com/userfiles/file/31805889451.pdfIn PDF document text
- https://toppelletmachine.com/d/files/vujozerepuvupowowok.pdfIn PDF document text
- http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed957f3102---liguso.pdfIn PDF document text
- https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/e30c30542d6a5e36a86b83e5fe86078e/wobitiwupamasovotukofugaf.pdfIn PDF document text
- https://garnizone.com/userfiles/file/tevesu.pdfIn PDF document text
- https://bedandbreakfastchia.it/userfiles/file/xaxitafatefozaxefu.pdfIn PDF document text
- https://motiv8workout.com/up/files/goxanemoxuwukivaga.pdfIn PDF document text
- https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/f499edb30e2aceb2deb5cad53f09f830/revobabaruvi.pdfIn PDF document text
- https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/2iek2cc00l1pf0tpfrpdbn3ao8/fuxejipotilunefodixoxu.pdfIn PDF document text
- https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/527263e65969bee946a40d7fa59f63a2/tamenofodawo.pdfIn PDF document text
- https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc3aa4dc48---bemamapadoxanaga.pdfIn PDF document text
- http://perksys.com/userfiles/file/wijamasadosovigipubikafu.pdfIn PDF document text
- https://batdongsandothanh.vn/luutru/files/roturevoripuzulubabomixon.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d545e8a76f5---52395815678.pdfIn PDF document text
- https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/bh2j4m254asvid3prnmnqhfksb/jaredibagixapimatovax.pdfIn PDF document text
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/42a9abafd53f22990fe48b4eaf9072a4/woduvarum.pdfIn PDF document text
- http://vanillasky-ch.com/images/files/zinikave.pdfIn PDF document text
- http://vervesimuhub.com/userfiles/file/nojekumireb.pdfIn PDF document text
- http://paolacaone.eu/userfiles/files/kekumowosumixabigaxusikiz.pdfIn PDF document text
- https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b27e2d64e57---84128691931.pdfIn PDF document text
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d08f950eab---jisixupupidozufom.pdfIn PDF document text
- https://francoisdaulte.com/ckfinder/userfiles/files/morewurawij.pdfIn PDF document text
- http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b87418c19c0---40985053338.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=fortnite+launcher+exe+downloadPDF 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_off0000d89b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD89B	10564 bytes
SHA-256: `a1fa7c7d7dff1a9d82d7997dc85611d5b218b5ac15df63e5f5a402aa9e0e3e01`
`font_01_sfnt_off0000f0a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0A6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000108b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108B8	17260 bytes
SHA-256: `3d1d076b7c9417d851d8e6c898bb7351ed2b088131e1e27cc3cb0377e8096093`

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