PDF malware analysis — malicious · bdfb89311067e175

MALICIOUS

PDF

79.2 KB Created: 2021-09-08 19:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 87bbc2cda7f48fd2c80996b06fa52540 SHA-1: 6b27721127393a9d15ead38062fd7445014e988c SHA-256: bdfb89311067e1751d71c3f037a68b36216f4ef76bb16c5ea5c00c17fa8a2dba

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using these links for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=sistema+bethesda+de+tiroides+pdf PDF link annotation
- http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/75982191813.pdfIn PDF document text
- https://bipalisdemo.dashindonesia.com/userfiles/files/34252800738.pdfIn PDF document text
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315ca682353---zosiguwin.pdfIn PDF document text
- https://driftwoodcc.com/userfiles/files/66590956253.pdfIn PDF document text
- https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138762d89e64---tovaruwetedatipobozof.pdfIn PDF document text
- https://trsoftyazilim.com/genelresimler/file/dubazusitenobaxubuzixax.pdfIn PDF document text
- http://thedewakohchang.com/image/upload/File/ifasomipomasadajoneva.pdfIn PDF document text
- https://zbmbudomont.pl/userfiles/file/lulezixifowipukamali.pdfIn PDF document text
- https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/0cnjf5uu46pl1v80gumn1706lj/zibulovabetim.pdfIn PDF document text
- https://maconlux.lu/userfiles/files/walikifisulilo.pdfIn PDF document text
- http://bimbrlata.cz/UserFiles/File/47639060371.pdfIn PDF document text
- http://www.ctmmaximoravenna.com/ckfinder/userfiles/files/jagok.pdfIn PDF document text
- http://hzbmsj.net/images/upload/File/zarubaruwixuvibavuve.pdfIn PDF document text
- https://manhremhoangvan.com/wp-content/uploads/files/62883333263.pdfIn PDF document text
- https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309f81bdf68---85926579038.pdfIn PDF document text
- http://www.moyekolodin.com/files/wesolumutepixikadisejup.pdfIn PDF document text
- http://www.maderas-navarro.com/ckfinder/userfiles/files/10263629775.pdfIn PDF document text
- http://standdominica.org/files/files/11392563924.pdfIn PDF document text
- https://bellcera.60km.com/upload/files/dajijuputamumonipeno.pdfIn PDF document text
- https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/lezakedo.pdfIn PDF document text
- http://zabbeleecooking.com/ckfinder/userfiles/files/bujuzenobonamezu.pdfIn PDF document text
- http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/zibifatenaxitawodebuvow.pdfIn PDF document text
- http://condosworld.com/abisol1/userfiles/files/66241371858.pdfIn PDF document text
- http://www.globalnautique.nl/upload/files/sumipux.pdfIn PDF document text
- http://glassick.com/userfiles/file/26203316776.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_off0000cfcc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFCC	10828 bytes
SHA-256: `6a7d1e335c6cd841b330abb1085668687f57083d43314ce3611d82b9888d9213`
`font_01_sfnt_off0000e888.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE888	18148 bytes
SHA-256: `36fe17572430d1af6631fb07cdc67ce93ef6edc5757e0f9b0f2d543ef28fd00d`
`font_02_sfnt_off0001172a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1172A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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