PDF malware analysis — malicious · b988359589a49644

MALICIOUS

PDF

81.7 KB Created: 2021-09-20 01:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 01663e1721c137d5da41977def438aa2 SHA-1: 5d8c635accdc38daea6f5cb92a4d3106761ca7fe SHA-256: b988359589a49644a363c58930938561e4fdc7494ecef4d5fa59f4d7e4a2a2d3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score further support its malicious nature. The primary attack pattern involves luring users to external sites, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

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://irlanc.ru/uplcv?utm_term=pes+2020+lite+apk PDF link annotation
- http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/28775333905.pdfIn PDF document text
- https://balaji-technology.com/userfiles/file/rimidapujufetonulag.pdfIn PDF document text
- https://gadesign52.com/uploads/files/202109050718522306.pdfIn PDF document text
- http://flomojapan.com/upload/files/5068779848.pdfIn PDF document text
- http://www.srijonihealinghome.com/fckimages/file/sudogixamutofes.pdfIn PDF document text
- http://mycoapaisyl.com/webimages/files/juguf.pdfIn PDF document text
- https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614322e3e38bb---julegobuvot.pdfIn PDF document text
- http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/d74d7b1bef80bbb05ff9627453c4c7dd/kevumezu.pdfIn PDF document text
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131797fa375b---jibare.pdfIn PDF document text
- http://www.impactit.in/ckfinder/userfiles/files/54734163513.pdfIn PDF document text
- http://rovitek.com/userfiles/file/1433656783.pdfIn PDF document text
- https://ladangmimpi2.com/contents/files/49458737050.pdfIn PDF document text
- http://www.autoservis-hubatka.cz/admin/upload/ww/file/84873970658.pdfIn PDF document text
- http://www.firstpages.eu/app/webroot/files/userfiles/files/58132962773.pdfIn PDF document text
- http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137655250a1e---gewufopikakelora.pdfIn PDF document text
- https://searchlink.org/userfiles/file/3811965227.pdfIn PDF document text
- https://biholka.cz/uploades/userfiles/file/98265610354.pdfIn PDF document text
- https://tempatpasang.com/contents/files/jovedisepodori.pdfIn PDF document text
- http://sklenicky-obchod.cz/web/admin/fckeditor/userfiles/file/sejodopoguwebugidetavafe.pdfIn PDF document text
- http://pm-property.pl/userfiles/file/vegumefu.pdfIn PDF document text
- https://coimbatorepressclub.com/FCKeditor/userfiles/file/74646994453.pdfIn PDF document text
- http://liqaa-lb.com/files/userfiles/files/bemonejajo.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309f0e7c3bf---42276465677.pdfIn PDF document text
- http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/pozipesodewelid.pdfIn PDF document text
- https://transport.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/bijevagugogu.pdfIn PDF document text
- http://goldenpeak.it/userfiles/files/57286044505.pdfIn PDF document text
- https://razredna-nastava.net/files/bulejoroxurezofixi.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_off0000d662.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD662	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ee79.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE79	10256 bytes
SHA-256: `1dedf211d0cbce8cdcf6ed4b2af0541b2f004a4049ddd714e718fefb88cd5009`
`font_02_sfnt_off000105c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105C3	19464 bytes
SHA-256: `8c7a5cc805a13c2ab8e8802b97e95570adc954633eeb46dc40747b56f3d64bee`

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