PDF malware analysis — malicious · 4968849894ba53b8

MALICIOUS

PDF

83.8 KB Created: 2021-09-06 14:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29

MD5: e957a8c2f414646906811c11dd1e6d83 SHA-1: ccbd18ce9a2c6bf16bd3721116ce2adaf1790462 SHA-256: 4968849894ba53b8064fd72885da9e19ee8f495968d60148a5cc2ee3207fd85d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous external URLs were extracted, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The PDF structure and embedded URIs indicate it's likely a phishing lure or a downloader for further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://chcial.ru/uplcv?utm_term=pearl+pdf+free+download PDF link annotation
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a32b2ab5036---batoweduwepudozudo.pdfIn PDF document text
- https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/t3l28ocp2kd4p05rcdqhrg2o29/lefusaruwemu.pdfIn PDF document text
- http://matsonconstruction.net/userfiles/file/6332595579.pdfIn PDF document text
- https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1034819e88---xetor.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/pdpbrehvbovhjnb2jjvoongvo3/kobujibubogukowipejuki.pdfIn PDF document text
- http://cngwalk.com/fckeditor/userfiles/image/34213122695.pdfIn PDF document text
- https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/e0ada1d547a8835ce420d492092c9ff5/nenaxijawajuneb.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44a1612e9---73927189452.pdfIn PDF document text
- http://aliguoriarchitetto.eu/userfiles/files/puxezabarun.pdfIn PDF document text
- https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/3b182d78eff0b68017fccc35916699f9/21042044839.pdfIn PDF document text
- https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/0db44d31684996db892c8a886c6d78da/95940410407.pdfIn PDF document text
- http://coffee33.ru/archive/file/35763010202.pdfIn PDF document text
- http://atletika-pardubice.cz/files/file/repobiwitogipovadixejakeb.pdfIn PDF document text
- http://dgjst.com/upfile/file/nijugagelurubirisibexe.pdfIn PDF document text
- http://vankouwenenmastop.nl/UserFiles/file/linaboguko.pdfIn PDF document text
- http://lindendirect.com/ckfinder/userfiles/files/42630620511.pdfIn PDF document text
- http://zonazero.es/userfiles/file/86472585805.pdfIn PDF document text
- https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/6e6c63c8cdf8b639982258257034ef74/tofiwemofekajuzezebob.pdfIn PDF document text
- http://enricobarraco.com/files/maripipuwevos.pdfIn PDF document text
- http://infunplastic.com/d/files/puwumi.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa17b9b1d10---57488953878.pdfIn PDF document text
- https://laplacedesstores.com/upload/file/39772500877.pdfIn PDF document text
- https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/e520692a0c1b6338cc534011b11e865c/bugupazuzijopogezafo.pdfIn PDF document text
- http://efuturesthai.com/uploads/file/pijimigozogatata.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_off0000e32c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE32C	10220 bytes
SHA-256: `272c2a192c452d72c4799148a6a90afb77d259141cb6ec03b5de9a028b73aa69`
`font_01_sfnt_off0000fa3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA3D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001124f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1124F	18104 bytes
SHA-256: `90d044a63a3c2fa081bca0494e4558a1b0ed3db229f39952deff075eedac0e3f`

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