PDF malware analysis — malicious · 6b6fa2731f59c14f

MALICIOUS

PDF

74.8 KB Created: 2021-06-07 18:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 2626d27396766861b37f5ef800692c5e SHA-1: 5be5cbc4f7049275fe11f33d058ee128909117a1 SHA-256: 6b6fa2731f59c14f8c814c20c2d76e2d6fbff18136dee54ffdecae7ee3328f5e

174 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains references to 'vertical diet 3.0 reddit' and 'wkhtmltopdf', indicating a potential social engineering pretext. No scripts were extracted, but the presence of external links and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.8576

Heuristics 6

PRC/3D content in PDF medium CVE related PDF_PRC_3D

PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
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
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://catamma.ru/uplcv?utm_term=vertical+diet+3.0+reddit PDF link annotation
- https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/cv7ofkm9dr6t7j38r7iq9go8n3/48859438285.pdfIn PDF document text
- http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c01125b36---21058634319.pdfIn PDF document text
- https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b746ec4d4c4---32351986667.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1609dee9f74688---70110839775.pdfIn PDF document text
- http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076d30c403b8---jofosanetupe.pdfIn PDF document text
- https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/f6294a7f8c071d61c6154ae7acb478f8/loretazemisozorubapig.pdfIn PDF document text
- https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/eku5lohsspedef9p1picplce5o/topota.pdfIn PDF document text
- http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caafd48bde---zaparomubaxorogop.pdfIn PDF document text
- https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/57e8ff552b129b720221c7a4b2d81446/koxugufudumur.pdfIn PDF document text
- http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e2849bc01005b3a611cad11e1932ca21/woxegulagi.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160744f15a791a---vifofakiwolofes.pdfIn PDF document text
- https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/67dcfc8e3b1fa1fb5cfc629d87daff96/lejani.pdfIn PDF document text
- http://baschin-heizung.com/meineBilderAlbertGrundschule/file/basim.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6ca27e7dd---juruxego.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d9b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9B5	2900 bytes
SHA-256: `9c84aca5171cf4522e1fd23f3e5391e17c8e645cdcb740b4c3036af6865bd014`
`font_01_sfnt_off0000e3fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3FA	5060 bytes
SHA-256: `7788186381a659798345829d077b779c42188941783df59bd15f0d7655129095`
`font_02_sfnt_off0000f538.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF538	4284 bytes
SHA-256: `6222dba8c6942a126dcce46808cb82b42858575af8460416481c73f7b9b52b24`
`font_03_sfnt_off000100c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100C0	11732 bytes
SHA-256: `25d4b340a643d75d2f57b3476cabb801683c507664dc9c424facd7f12849bb64`

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