PDF malware analysis — malicious · 2e0b0f1c80e88eb6

MALICIOUS

PDF

96.7 KB Created: 2021-08-09 23:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27

MD5: 077cf5ca2a3d7e0ebaee5f0c2c69e002 SHA-1: 99a10cecc8a63f323555b74c9929cd99b52086d1 SHA-256: 2e0b0f1c80e88eb642cd9e2d5312d809bad62eec997a70de1c3481dc3968c8d2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to multiple compromised WordPress upload locations and disposable hosting sites. These links likely serve as a distribution point for further malicious payloads or phishing attempts.

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 http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c87d520e1---veruxonizupobavuzudur.pdf In PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e6473037aa6327a6f3041659347d1d72/45157894010.pdfIn PDF document text
- http://tevukasveza.lt/ckfinder/userfiles/files/99928768632.pdfIn PDF document text
- http://ahkjt.com/upfile/file/90796623025.pdfIn PDF document text
- https://feng-shuiworld.com/userfiles/file/75460825506.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4511309a3---5439233065.pdfIn PDF document text
- https://mannerfeltdesignteam.se/ckfinder/userfiles/files/kazepudupaluxu.pdfIn PDF document text
- http://podlahypilat.cz/admin/file/42077838323.pdfIn PDF document text
- http://badaranquehablar.com/userfiles/files/19409348280.pdfIn PDF document text
- http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/b01cf2f6a6ebfbec97db531dbc286209/zoputefelifudepadarujiba.pdfIn PDF document text
- http://s8radziejowice-paszkow.pl/userfiles/file/24207663545.pdfIn PDF document text
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8523e66e1---1545516068.pdfIn PDF document text
- https://webvitamin.vn/app/webroot/uploads/files/86092875184.pdfIn PDF document text
- https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/0a2ev30mop59ena53jat8gajcv/92554034421.pdfIn PDF document text
- http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763c964acba---97017031787.pdfIn PDF document text
- http://hndgyl.com/v15/Upload/file/2021714245584706.pdfIn PDF document text
- https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/j2btajj9n3d44qmbfr4l2hd17l/joxuvatixazefetupero.pdfIn PDF document text
- https://audreyheselmans.com/_files/file/8884302999.pdfIn PDF document text
- https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/c3a064d74b4387a677967877477ef5db/19816903483.pdfIn PDF document text
- http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7dc052812---weluwevumagunijepowug.pdfIn PDF document text
- https://an-professional.ru/img/files/file/damafo.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b8a21cf69---35439220621.pdfIn PDF document text
- https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ffb0946cf4da5d03082cde58e341deeb/67046494821.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=economy+toeic+rc+1000+volume+1+pdfPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ef22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF22	16404 bytes
SHA-256: `d1055f25a9f7ce954f5a89a6b93c2d93e6c3b00a4f8f07ec0b9fee474ce3a5ef`
`font_01_sfnt_off000105b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105B0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011dc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DC7	10888 bytes
SHA-256: `92767174b532c9961480a957ace361fbd03511ab376a0240ca85dfc70922fb13`
`font_03_sfnt_off000136ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x136ED	30304 bytes
SHA-256: `c1b515b646a68e3a1904ca58d502599bf89393833a79d8ad639e43f241ef53f6`

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