PDF malware analysis — malicious · b6fd6ee0945cdc05

MALICIOUS

PDF

73.6 KB Created: 2021-09-16 01:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 6bc4a256899e432046bafdd78972b31d SHA-1: 065a36285634093b7e0b07591fe386661513bf57 SHA-256: b6fd6ee0945cdc05bb8bc948dc27d483016b214bcbf32af32ec329da7666f63b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://ipai-bg.eu/img/file/fopimonerepu.pdf In PDF document text
- https://drticket.ir/basefile/drtiketcom/files/kasanefokojono.pdfIn PDF document text
- http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jepadalu.pdfIn PDF document text
- http://3colorjazz.com/fckeditor/userfiles/image/62653711601.pdfIn PDF document text
- http://www.sosonomo.com/ckfinder/userfiles/files/detabefusegib.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161418f2adf290---57807526218.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140515ea514d.pdfIn PDF document text
- https://careerroots.net/ckfinder/userfiles/files/91847384085.pdfIn PDF document text
- https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/7fbf8f0aff24bd929b53129d60e7cbff/75427057799.pdfIn PDF document text
- http://www.farmaciapenil.es/userfiles/files/19400081867.pdfIn PDF document text
- https://bataretak.com/img/files/file/76422341838.pdfIn PDF document text
- http://duplisite.com/userfiles/file/miwiwamorenonabibof.pdfIn PDF document text
- https://halkum.rs/files/33154978446.pdfIn PDF document text
- http://baltic-rt.ru/ckfinder/userfiles/files/64756685384.pdfIn PDF document text
- http://apvn.info/userfiles/file/59813130457.pdfIn PDF document text
- https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/xopadiginamixugefufabol.pdfIn PDF document text
- http://mrcookie.tw/upload/editor/file/061415567821.pdfIn PDF document text
- http://lenosada.sk/editor_uploads/files/45971113303.pdfIn PDF document text
- http://msdoubrava.cz/foto/images/file/roziwugifisiwesaxulip.pdfIn PDF document text
- https://klcconsulting.eu/klc/file/38131122638.pdfIn PDF document text
- http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6813965c8---76239484124.pdfIn PDF document text
- https://youkuvpn.com/upload/files/42224876101.pdfIn PDF document text
- http://atdawnwelift.com/userfiles/file/kixanojomovusanop.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/db4c323663a3f3218459b142dc09e52d/59931848393.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=euro+truck+simulator+download+apkPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000baed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBAED	17176 bytes
SHA-256: `7cfc39fae505959e394dedd8d439a96e6987fc2a8fac7da9ed068bfd85911785`
`font_01_sfnt_off0000e763.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE763	10804 bytes
SHA-256: `f5866b0aabda85e4506fdf7a5ceb4657989502a490fa7c60d0dbfa3cd33cc51b`
`font_02_sfnt_off00010057.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10057	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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