PDF malware analysis — malicious · aeac21249a05eb00

MALICIOUS

PDF

78.9 KB Created: 2021-07-30 19:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: f1b2c2059d69ad96a08605a07e34b61b SHA-1: 17588eb9ea0ffa647f964cb4ada6293c8a8d2808 SHA-256: aeac21249a05eb00db08892a42b9742c0e5b3c487ce2ba34aac3ee35d59d822d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It functions as a link farm, directing users to compromised WordPress uploads and other potentially malicious URLs. While no scripts were explicitly extracted, the nature of the link farm and the compromised CMS uploads suggests an intent to redirect users to malicious content or phishing sites, potentially leveraging PDF exploits.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://gleneaglehoa.org/images/file/84354402959.pdf In PDF document text
- https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/b619441e59361351ef28df685b956881/5969900308.pdfIn PDF document text
- http://vitanova-cattery.com/upload/file/zupamaxiguduvosipowero.pdfIn PDF document text
- http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/246694701eb1b3cb945bb65095155f01/35644242645.pdfIn PDF document text
- http://beloezoloto.ru/userfiles/file/loxikezuberosexujovuxuk.pdfIn PDF document text
- https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d20a43bc61add83e7d4ac34fd63916ef/jorumamup.pdfIn PDF document text
- http://studioego.cz/userfiles/file/sitoteraketusamuxido.pdfIn PDF document text
- http://accessibilite-salle-eau.com/ckfinder/userfiles/files/61601739623.pdfIn PDF document text
- http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/54142751603.pdfIn PDF document text
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/bfa542641bcdee00d03ae7f31dface94/tejemexilur.pdfIn PDF document text
- https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160fe693c255d4---baxogerezulibise.pdfIn PDF document text
- https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/802c37adae36acc26d562726e71789de/womuwajaj.pdfIn PDF document text
- http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3766789ceb---fawobibetixibokezowodazod.pdfIn PDF document text
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b3aebf3da---rixiluroxaf.pdfIn PDF document text
- https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/1hbi2c7tk9v4r46naor9h2hgt4/98831827133.pdfIn PDF document text
- http://sashtraayurveda.com/ckfinder/userfiles/files/28149990644.pdfIn PDF document text
- http://cathyknightwaite.com/ckfinder/userfiles/files/42304642262.pdfIn PDF document text
- http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d7e26157c14---vipuvikaberiviterewade.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089791b091f7---nigetojuxok.pdfIn PDF document text
- http://aelma.com/sites/default/userfiles/file/1485404267.pdfIn PDF document text
- https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/jfrl0b3uichgaktnp2jh3l9t93/felujosuragebuw.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/3da75f23845a9794f1813130b155fdcb/kidunoku.pdfIn PDF document text
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/cbd98c62508baed448703145cc554ccd/bekidijevobaf.pdfIn PDF document text
- http://braciszewska-klimek.pl/fck_files/file/54327108006.pdfIn PDF document text
- http://aylincinarli.com/fckfiles/file/5088996684.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=ejercicios+verbos+gustarPDF 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_off0000ce5e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE5E	17508 bytes
SHA-256: `2ad568a5ed75fa997c87f02c7867658ada0d1c44d7b157cda2afcd9cd945c6ab`
`font_01_sfnt_off0000fb1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB1A	10676 bytes
SHA-256: `db49b55479586d7354ccc038a5383ad32501609b8bbcf6911274cfef96ab9a1d`
`font_02_sfnt_off000113c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x113C1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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