PDF malware analysis — malicious · 7731c2213f2a5219

MALICIOUS

PDF

90.1 KB Created: 2021-08-25 00:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 79c7c46c93577b8376632d58eea125ae SHA-1: e5f67bbb2b3430d8e52218142ccbd0153a8e3244 SHA-256: 7731c2213f2a52195ac2accc2c3a972206dafcf34baa2440f15222b2695fe789

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Numerous heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution campaign. The embedded URLs, such as https://smidgel.ru/uplcv?utm_term=such+a+peaceful+place, are likely used to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://smidgel.ru/uplcv?utm_term=such+a+peaceful+place PDF link annotation
- http://geonatlife.es//ckfinder/userfiles/files/62356003819.pdfIn PDF document text
- http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/99872437458.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/95oto8ouaj203q0knvodf1pvjt/laxaziwaxefufuvimokilipoj.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/a8af563a6a07732f6cf54dd48db3576a/23417857090.pdfIn PDF document text
- https://china-glass-mosaic.com/userfiles/files/20210808_175417.pdfIn PDF document text
- https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/vcts5avskql0acj95uaqsu276u/gokubafigadetuzaf.pdfIn PDF document text
- http://mptech.vn/ckfinder/userfiles/files/veguluguvizusafif.pdfIn PDF document text
- http://bakkervoorwinde.nl/app/webroot/files/ckeditor_files/files/4391991856.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a821b6f2a2d---zitesagugovokajufizimona.pdfIn PDF document text
- https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1a7c7446ed---pimorufosakobedez.pdfIn PDF document text
- https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/ihkjga9nsethmug26bouo20hpc/wulavugi.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3248f2b798---86411292190.pdfIn PDF document text
- http://richmore.kr/uploadfile/fckeditor/file/lozixena.pdfIn PDF document text
- http://aitrans.cn/UploadFile/file/F1202106171152278653.pdfIn PDF document text
- https://www.playitdirect.ca/ckfinder/uploadfiles/files/61929368587.pdfIn PDF document text
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/dvvp2lg1rtcrt9p1k4k7nnsg35/pejagimudosufi.pdfIn PDF document text
- http://nkmate.com/FileData/ckfinder/files/20210702_944B2658682D46B2.pdfIn PDF document text
- http://lmleadmanagement.com/userfiles/files/59186419413.pdfIn PDF document text
- http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb6391bf1a---mukuvofafe.pdfIn PDF document text
- http://townofwinslowin.com/flash/townofwinslowin.com/file/bezubag.pdfIn PDF document text
- https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826aab39d70---malosojiminofilaluk.pdfIn PDF document text
- https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ktq6skjbmbrlm07v6mv6vph5fl/lamipimavunazomude.pdfIn PDF document text
- https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a1c9282ada236509b1b2e52c79dc7361/88780481004.pdfIn PDF document text
- http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4f7df3463---ziwimekutekasuzelox.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_off0000fc2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC2B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011442.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11442	10068 bytes
SHA-256: `7b8caea138fc686dd0755d645261de7ca7bc5775ee65c3b396a0e8d23a877589`
`font_02_sfnt_off00012ad2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AD2	17548 bytes
SHA-256: `8668ab5670d868c42847c3a3a46148a3ec0f30f5d0a27b5f951b3a2d9b5102f1`

Open this report in the interactive analyzer, or submit your own file for analysis.