PDF malware analysis — malicious · 94fe52817cd54151

MALICIOUS

PDF

80.8 KB Created: 2021-09-01 23:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 0b5ee03508d5d706c4ff1d6dbc9b4b2d SHA-1: 90293a741a0e8f0eb45cdc3f8b68940ba581f1a6 SHA-256: 94fe52817cd541517ef3b7bd36503221c4a376d353a2dfb9958267c2454c8995

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of phishing or malware distribution attempts.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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 http://salman-is.com/userfiles/file/76776423225.pdf In PDF document text
- http://hasyo.net/files/file/70018213677.pdfIn PDF document text
- https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/1f7171274bee2ac34fe3bc9a0c30772e/dalupepukifem.pdfIn PDF document text
- https://oferta.lt/i/File/96705457546.pdfIn PDF document text
- https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/342459f006a72422218263f843e64476/1062445654.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787d761e573---15391094810.pdfIn PDF document text
- http://ruresept.ru/files/file/gabowaporemajobiwotuvuk.pdfIn PDF document text
- https://stdtekstil.com/upload/ckfinder/files/tazor.pdfIn PDF document text
- https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/1937aa2cd2b80165a30ed31dba8a892d/97945596743.pdfIn PDF document text
- http://www.astmalek.cz/obrazky/file/80107976513.pdfIn PDF document text
- https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/933c42ef5e85beb1455e9ba08172b47e/56259210112.pdfIn PDF document text
- https://vnsteeldetailing.com/UserFiles/files/5989932397.pdfIn PDF document text
- http://fitviewer.de/files/file/8724065570.pdfIn PDF document text
- https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/f0200jkp8r67fmnkr1r5a0hq5u/sikezevifugobu.pdfIn PDF document text
- http://arniestribu.com/campannas/file/tetonovumukozebirule.pdfIn PDF document text
- https://cupanghitam.com/contents/files/75181363747.pdfIn PDF document text
- http://dush-kz.ru/uploads/fck/file/14423732450.pdfIn PDF document text
- http://humidorio.de/ckfinder/userfiles/files/60052159998.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff5b77e1988---90070395175.pdfIn PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd647eb4e1c---jopagovew.pdfIn PDF document text
- http://atut-biuro.com/uploaded/file/wupugim.pdfIn PDF document text
- http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ca3f0ffdf---85444506758.pdfIn PDF document text
- https://tagoproperties.com/ckfinder/userfiles/files/tiribumu.pdfIn PDF document text
- http://easternhoteljeju.com/FileData/ckfinder/files/20210806_13F3223DB8451B96.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=wood+county+land+recordsPDF 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_off0000d927.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD927	10476 bytes
SHA-256: `5bab3d21083cc9f5fbc081c5e9171a83999dd060ab5fed6882e6acbba0cbec9d`
`font_01_sfnt_off0000f12d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF12D	16968 bytes
SHA-256: `6931d0d53a53ad194d5627dcc8f39aeff103f660a4d7c91d1c533ae5ae88fe0a`
`font_02_sfnt_off00011ca3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CA3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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