PDF malware analysis — malicious · 768d240a8fd30e80

MALICIOUS

PDF

90.2 KB Created: 2021-09-04 16:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 20ae1496cfa5b3888f2c9c0785e7227a SHA-1: a580c993849f3d342ee780caf3479fc5bed9bced SHA-256: 768d240a8fd30e80bb8d8c75e0db5bdaf03318d8855af7f29a73a0ef2f369fab

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm on compromised CMS uploads. The document body is heavily obfuscated, but the presence of numerous URLs suggests an attempt to redirect users to malicious content. The SE_INVOICE_LURE heuristic further supports a phishing or scamming intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://newat.ru/wp-content/plugins/super-forms/uploads/php/files/62fb4f53cbea5ef3a4a0965f8cf7a4cd/81907748480.pdf In PDF document text
- http://ypperfect.com/ckfinder/userfiles/files/6165649173.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607013fb4a523---66829666191.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fce17eda1---52364255705.pdfIn PDF document text
- http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ade9ab94b---zosutogozosudidaritub.pdfIn PDF document text
- http://ahkjt.com/upfile/file/jamisudoferezagalubujijaw.pdfIn PDF document text
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e81acc229---matokenojumafomonem.pdfIn PDF document text
- http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22226727597.pdfIn PDF document text
- https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/bcac738891520bcbcd6025273394e846/winazubuga.pdfIn PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/1b4608a8bed1293806e820e5eccc85a4/64931420087.pdfIn PDF document text
- http://dalnoboy.net/data/filestorage/upload/files/famopawalobej.pdfIn PDF document text
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa3b33d5dd---fonowuvokebag.pdfIn PDF document text
- http://baracenter.be/userfiles/file/taxobanejigenedexe.pdfIn PDF document text
- http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/161168cf3e30c7---bogezamimomovesekibomit.pdfIn PDF document text
- http://likebarcode.com/image/files/20210713_224323.pdfIn PDF document text
- http://goldia.cz/data/file/92975622760.pdfIn PDF document text
- http://tupnate.com/ckfinder/userfiles/files/girasezok.pdfIn PDF document text
- https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/067dc8571fc43a57e14ad59b56ce2355/17058386008.pdfIn PDF document text
- http://emusicmarket.com/upfile/board/files/39739622501.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/jgn7bb3j3tsa4ul370a2flch8e/tevalovoxux.pdfIn PDF document text
- https://gamedunyasi.com/calisma2/files/uploads/gobovu.pdfIn PDF document text
- https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/bf1caa4b58d0995e6fb27d40b0e6b14b/2798431868.pdfIn PDF document text
- http://dycelife.com/userfiles/file/vawonejubezovanuzezus.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/0fniklird27j3cokk8irjpi3nl/sidanem.pdfIn PDF document text
- http://automotiveenergy.cz/userfiles/file/kusejafufasupediwi.pdfIn PDF document text
- https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607caff6a051b---1530444997.pdfIn PDF document text
- http://3qbuy.com/CKEdit/upload/files/35880351445.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=grammatical+structures+in+english+pdfPDF 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_off0000f9cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9CF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000111e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111E1	18140 bytes
SHA-256: `9ee6ec9d64a61edcd1bd70d1c889cd0ab6b926c67d3d57d374c57c0a4dec041d`
`font_02_sfnt_off00014142.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14142	11084 bytes
SHA-256: `54777cc56560af9fdf64717379fb4673c9e902238b27eac716b5bcbd2f29f2f0`

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