PDF malware analysis — malicious · df27f363b500117a

MALICIOUS

PDF

82.5 KB Created: 2021-08-21 12:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: f02eab5317541495c8f571898ef19575 SHA-1: 7b38ed1f781128123517414a69b802daa204e006 SHA-256: df27f363b500117a4358771a373b88d2e6b9aef83ab4761b6d44cb3214740062

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it is designed as a link farm to redirect users to malicious content. The presence of 'utm_term=character+ascii+value+javascript' in one URL indicates a potential attempt to lure users with misleading search terms, possibly leading to further exploitation or phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

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 https://drafthe.ru/uplcv?utm_term=character+ascii+value+javascript PDF link annotation
- http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/flebke3ic9sfv5ed1vf18sdtc4/40810400568.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1891a9e09e---50861939296.pdfIn PDF document text
- http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d2cae36d07b---digulowazonugo.pdfIn PDF document text
- http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acc37613a96---rajuduf.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607662f4d93b7---vifiwezixutekisoxexaxe.pdfIn PDF document text
- https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093356f73a03---lowobaretawazibunesup.pdfIn PDF document text
- http://tajeer.co/userfiles/file/konamix.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/a3fd35db9beb7ba3158c6c7af862739c/43557905752.pdfIn PDF document text
- http://kristenpell.com/userfiles/files/83170409211.pdfIn PDF document text
- http://clear-es.net/yamituki-n/uploads/files/kerimabazasumazi.pdfIn PDF document text
- http://195exim.com/datas/files/86669128835.pdfIn PDF document text
- http://distributoram.com/files/file/wusomuzozovigazomiwapufu.pdfIn PDF document text
- https://bilalyapidekorasyon.com/userfiles/file/72260789041.pdfIn PDF document text
- https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/8v7np7k6nd2n17d3rvvsduhjuq/gawumumipezepu.pdfIn PDF document text
- https://parklanehotel.asia/userfiles/file/modapugofojupoxawaruf.pdfIn PDF document text
- http://akifkasaboglu.com/esatfisek/images_upload/files/mujanusebevobibezed.pdfIn PDF document text
- https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/b7ae84fdce1c7b6b30a236139f3a7e50/94740247309.pdfIn PDF document text
- http://amdind.com/userfiles/file/52027266090.pdfIn PDF document text
- https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/c6ac9dd3365f918adafae7cb168df7fc/xijemuzolusafoxobigogiwo.pdfIn PDF document text
- https://galerieportelouise.be/userfiles/files/2231206760.pdfIn PDF document text
- http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/777a2c2cd87857478abc8443f2ba8c82/17004564079.pdfIn PDF document text
- http://gernano.eu/gfx/userfiles/files/45904279100.pdfIn PDF document text
- http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9d5a574c2---35222079447.pdfIn PDF document text
- https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/09db12067ee02938eb0815623c9ba9a8/5908106101.pdfIn PDF document text
- https://divinenine.net/userfiles/file/67837554307.pdfIn PDF document text
- https://perfecthospitals.com/ckfinder/userfiles/files/71416059147.pdfIn PDF document text
- https://mangmalungtea.com/userfiles/file/86312338268.pdfIn PDF document text
- 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_off0000d96a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD96A	18676 bytes
SHA-256: `b315245b101d3cd73dcb39cd7df89cbdbc7555caf238c76269a680bba7996032`
`font_01_sfnt_off00010b76.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B76	10576 bytes
SHA-256: `db6b46312efc7be7dddefeeb1d215d3b3db8b96f8c57740447fbfbab200be27d`
`font_02_sfnt_off000123c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123C2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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