PDF malware analysis — malicious · 68e45483458864b7

MALICIOUS

PDF

82.7 KB Created: 2021-09-01 11:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: a4889d7f073d6a24a6ee57c95f733a2b SHA-1: d2d593b45ab714e60cc72b653e8bdbf3213df990 SHA-256: 68e45483458864b76559d03b93c63e21bc1db36699163c1e4501d60bbb87be24

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The `utm_term` parameter in some URLs indicates a potential SEO manipulation tactic to attract unsuspecting visitors.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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://chcial.ru/uplcv?utm_term=student+swot+analysis+example+pdf PDF link annotation
- https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081267e8d231---kanizazidexu.pdfIn PDF document text
- https://dwitunggaljaya.com/sitefiles/file/69887466964.pdfIn PDF document text
- http://phuvuongcorp.com/luutru/files/91090269055.pdfIn PDF document text
- http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160717f73ab58f---nutewe.pdfIn PDF document text
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16119705d44a8b---54380351030.pdfIn PDF document text
- http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/52ce3fa58cb3e9c6a51bee3abcb7b984/98673199447.pdfIn PDF document text
- http://7seapharmtech.com/Uploadfiles/files/tumen.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d39d9cab9---naxufadijenuriwapaligu.pdfIn PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/ubculqfl5dhvhbvgdqg5kr1116/9212228925.pdfIn PDF document text
- http://modernplating.com/userfiles/file/48383908164.pdfIn PDF document text
- http://anshan56.cn/userfiles/file/16270198661969504711.pdfIn PDF document text
- https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/cdf2ad430b507c3750bc82bc06e049e9/baluxizimagobavafulu.pdfIn PDF document text
- http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/50735688700.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6e1b67c11---sepewodovo.pdfIn PDF document text
- https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/05uj5m0hgb53njvs8ldcis4uif/kofibuwux.pdfIn PDF document text
- https://windsbs.biz/files/file/60766134136.pdfIn PDF document text
- https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/p6egkrcqu8bbsqif6j6q92uvm4/4001332721.pdfIn PDF document text
- https://weeb.nu/userfiles/file/6821275486.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/jagejapugem.pdfIn PDF document text
- https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611167330d287---tifajefujesunu.pdfIn PDF document text
- https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/5c0582e9e24fd1ad4761fa378a02d491/65538121696.pdfIn PDF document text
- https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099551898ed1---gimugapojuzivesan.pdfIn PDF document text
- http://comp-art.ru/userfiles/file/pedanikapofikoxelujivejop.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_off0000e1fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1FE	15688 bytes
SHA-256: `163c8f1e80a46fa21ce9bdb9db399aaf6a371c2bf934a3edc768c2f7b775f278`
`font_01_sfnt_off00010a33.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A33	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001224a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1224A	11036 bytes
SHA-256: `2faa0f24db157d528bbb994b55cd41140edfc8c37b29397fba045a4ab84f0212`

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