PDF malware analysis — malicious · c5a568ee2a4791e6

MALICIOUS

PDF

94.3 KB Created: 2021-08-09 07:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 345e589224585ef31b34d93138bed47c SHA-1: af642c7ad086c473391d0606f48e72e1d4cd45ee SHA-256: c5a568ee2a4791e62492c7e3007b26a6e59c8165060d0cf29f2861d512c7a70e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to external malicious sites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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://smidgel.ru/uplcv?utm_term=descargar+juego+de+metal+slug+5+para+android+gratis PDF link annotation
- http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54887056835.pdfIn PDF document text
- https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e5aebe738---sumasusabegegumube.pdfIn PDF document text
- https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/412e89b3bdc7c1807a8a174519fda76c/dejirubuzegeboloba.pdfIn PDF document text
- http://biomisszio.hu/tmp/vafupizifudunonaporasefop.pdfIn PDF document text
- https://mzr-avocats.com/buddha/ckfinder/userfiles/files/83248758719.pdfIn PDF document text
- https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/fe1b0bf6cbc3aa8b0e7687ac204975c5/6002653664.pdfIn PDF document text
- http://gr-chem.com/upload/files/26686298159.pdfIn PDF document text
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/4c6649b6774cc6957e161b96c03df635/25513681798.pdfIn PDF document text
- https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/5a64adb10dc00a16eb8d9f0fbeb661b3/514718351.pdfIn PDF document text
- https://apoiotelecom.com/imagens/img_fckeditor/file/guxogovirofen.pdfIn PDF document text
- http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa8271e174---25663325105.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a388c8c06dd---70888499796.pdfIn PDF document text
- https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160849dec7eaf5---35421710653.pdfIn PDF document text
- https://charterfori.ir/basefile/charterforiir/files/2497895319.pdfIn PDF document text
- http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1fa043287---tebonuta.pdfIn PDF document text
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7df982f3f---xuvakula.pdfIn PDF document text
- http://www.520amis.com/upload/files/delepobudinozu.pdfIn PDF document text
- http://baobiachau.com/luutru/files/3933386909.pdfIn PDF document text
- https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/daeb057aeff5764d48652b01de2b7229/josedudix.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e009e80eb---22065674128.pdfIn PDF document text
- https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/cf370ea8580873ab8a4dec9858860731/rulilapa.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160772ba287e99---18426736498.pdfIn PDF document text
- https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/1f9bec1be0d7576d188792bf5cdfa050/ladap.pdfIn PDF document text
- https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afa6922adc0---misuwikopafixexiki.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa0a794efe---xewixe.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f2f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2F5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010b0c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B0C	11224 bytes
SHA-256: `d3824c9030eb5682904fd2f4dfdc071f73e3a617220f2e871706a63b29282430`
`font_02_sfnt_off0001252d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1252D	16068 bytes
SHA-256: `6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d`
`font_03_sfnt_off00013a49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A49	18444 bytes
SHA-256: `92115066baf8eac121528004868bd454ed3d527341f0488f247cbee126c6d3cc`

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