PDF malware analysis — malicious · 847184c0199be567

MALICIOUS

PDF

80.1 KB Created: 2021-09-22 13:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 5b2ff4051d2700a7a2c62f25106213b7 SHA-1: 54db8162be0f794a2e995a119398d84ffe34ae67 SHA-256: 847184c0199be5671af1aa2d6475ed576201c41b44c413c93bcaf1bedd884289

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, several of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. The primary attack pattern involves directing users to potentially malicious or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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 http://emanuelarombiarchitetto.eu/userfiles/files/nuzulimo.pdf In PDF document text
- https://adian.eus/files/galeria/files/defupajegoferim.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614638177cc39---48551199453.pdfIn PDF document text
- https://brianhigbielaw.com/UserFiles/file/lutami.pdfIn PDF document text
- http://gmtshipping.com/attachment/file/gategafowosusa.pdfIn PDF document text
- http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/zomonumukufu.pdfIn PDF document text
- http://esipro.fr/userfiles/file/95567506669.pdfIn PDF document text
- https://allmassage.net/upload/file/20210922191949.pdfIn PDF document text
- https://www.larche-de-jules.fr/ckfinder/userfiles/files/14591180140.pdfIn PDF document text
- http://a899.net/userfiles/file/18199881035.pdfIn PDF document text
- https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16137ef25b676f---jupuwugofinozaxoxumiz.pdfIn PDF document text
- http://solarwindependence.com/ckfinder/userfiles/files/negadibebazubodadal.pdfIn PDF document text
- https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/dakosonibobajalezusuzepu.pdfIn PDF document text
- https://polymadeniyaglar.com/fckeditor/userfiles/file/durulib.pdfIn PDF document text
- http://luxcottage.ru/stroykamen/userfiles/files/70057196790.pdfIn PDF document text
- https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/1f74f525a5337fb152142ac132322669/59622813166.pdfIn PDF document text
- http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16145730f981c4---rutoro.pdfIn PDF document text
- http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/25dab7c7edd1cc3b211059beca3c2482/niwegituxadof.pdfIn PDF document text
- http://ktcyy.com/ckfinder/userfiles/files/linonajedemiveku.pdfIn PDF document text
- https://ln80.cn/filespath/files/20210917115149.pdfIn PDF document text
- http://ig-einheitsloks.de/medien/file/44029940996.pdfIn PDF document text
- https://bakwanudang.com/contents/files/44941048578.pdfIn PDF document text
- http://kolbiko.com/images/uploads/file/86876627607.pdfIn PDF document text
- http://sartoriaventurini.com/userfiles/files/32875355683.pdfIn PDF document text
- https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/6522899516.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=android+camera+apps+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_off0000d17c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD17C	18916 bytes
SHA-256: `666b3c6aeb8a59c4e0b855ecee4518d56bffcf6cf7ca2dd05aea29e12a4c6844`
`font_01_sfnt_off000102ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102AC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011ac3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AC3	10604 bytes
SHA-256: `24883b3e173325155ef7f4499983170aabc9a5d8a4e7fdf635fe11487320f437`

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