PDF malware analysis — malicious · 7f5aca74a47971c2

MALICIOUS

PDF

78.7 KB Created: 2021-09-07 18:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: de93995e19b43d4c0b629bc6e7bb5c70 SHA-1: 03fee11250c97376363e4fec20198ec909d46f84 SHA-256: 7f5aca74a47971c2142f27a86fc26fe5d9ac442dc433c0e2c82ae50e9091b840

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and embedded URLs indicate it functions as a link farm, likely intended to lure users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://oniceh.ru/uplcv?utm_term=korean+dictionary+book+pdf PDF link annotation
- https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c7f9cf9d1---26803370901.pdfIn PDF document text
- https://bahispesinde.com/gnc/veri/_files/judiz.pdfIn PDF document text
- https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/b1f14d095d173930f02b133f016b71f8/29755658618.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16105a7dde29df---70915641747.pdfIn PDF document text
- http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9956b9da72---vodokupoxulito.pdfIn PDF document text
- http://bhk-aindling.com/userfiles/files/gisimufupa.pdfIn PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e445acfbd4---14741096254.pdfIn PDF document text
- https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ada931e315d---99027760223.pdfIn PDF document text
- http://er-trans.com/img/produkty/files/27726727882.pdfIn PDF document text
- https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/96p6mbkhotdbic7sp6ku6aelom/113084211.pdfIn PDF document text
- https://mfdesign.hu/files/file/fepisozibikamowi.pdfIn PDF document text
- http://noithatnhapkhaugiasi.com/luutru/files/8425541148.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e74b464a73---90106385396.pdfIn PDF document text
- http://razaviota.ir/basefile/razaviotair/files/goponomojefiperodabe.pdfIn PDF document text
- http://interno-kazan.ru/upload/files/tipanurorevegimusox.pdfIn PDF document text
- http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbaf527b17---jetorukojawupi.pdfIn PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16097492045a4d---kuzojarife.pdfIn PDF document text
- http://zoekidsworld.com/userfiles/file/44147527492.pdfIn PDF document text
- http://www.pattyn360.com/upload/forum/files/vefuvudolizedepunofe.pdfIn PDF document text
- http://wamaeassociates.com/images/uploads/originals/file/wobuninuvenat.pdfIn PDF document text
- https://scavilecis.it/userfiles/file/wopisibivakemari.pdfIn PDF document text
- http://sheilahancock.net/blogfck/file/pikerenamudexukiza.pdfIn PDF document text
- http://sdds.be/userfiles/file/gudusajugat.pdfIn PDF document text
- http://rauvuonsach.net/images/uploads/files/49749891317.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16084ee0034265---napexefivepelofigikoxunuf.pdfIn PDF document text
- https://maisonforville.be/documents/file/56137462009.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_off0000d0ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0BA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e8d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8D1	10736 bytes
SHA-256: `8be1222684f0e39b65ae1767516353d2283179b7088572ec2503df05d8f0cc94`
`font_02_sfnt_off00010167.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10167	16872 bytes
SHA-256: `8e9d36bd3235ffbb1faad6e75bb36f2d1b070197f1b360753f2547919d4b5305`

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