PDF malware analysis — malicious · 0ca8d981057d292d

MALICIOUS

PDF

76.0 KB Created: 2021-09-20 03:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 8ff919abdb4548b49453b96a3c954b76 SHA-1: 3a212a88d9251f1b2e32df290a49f0d85910fe9f SHA-256: 0ca8d981057d292d0fe5ebee947e21b8b0087d0cfcb86fb8376f0702b3421d99

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://synerhu.ru/uplcv?utm_term=123movies+gomovies+apk PDF link annotation
- http://ipceurope.eu/assets/file/78429676920.pdfIn PDF document text
- https://lotusmarinevn.com/upload/files/28949044577.pdfIn PDF document text
- http://kirakuramenandsushi.com/uploads/files/liwevamen.pdfIn PDF document text
- http://bright-mineral.com/uploadfile/file/2021091104001970.pdfIn PDF document text
- http://csc0535.com/userfiles/file/20210902130430_eul9kv.pdfIn PDF document text
- https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/5ovju8knvrjrf3cuocmfdcp5qj/wulorilizememu.pdfIn PDF document text
- http://adaviestransportltd.com/userfiles/file/depugavunogagoxokal.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161363a2141854---rejugij.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16142f9a2a6379---82154105694.pdfIn PDF document text
- http://distant-property.ru/fck_editor_files/files/jasosoralovi.pdfIn PDF document text
- http://nguoigiupviec99.com/webroot/img/files/xotolufujelujimujuxeru.pdfIn PDF document text
- https://byocamacho.com/ckfinder/userfiles/files/rixipotipa.pdfIn PDF document text
- http://thegioituigiay.net/uploads/files/52280211258.pdfIn PDF document text
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/nbq92ihmp44jqpnm0qhndu2bg7/58150578372.pdfIn PDF document text
- http://medtravel.pro/images/hand_uploaded/files/45632655672.pdfIn PDF document text
- http://herve-coiffure.ci/files/77529657890.pdfIn PDF document text
- http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16138fc845fc26---97616110568.pdfIn PDF document text
- https://perfecthospitals.com/ckfinder/userfiles/files/21822467530.pdfIn PDF document text
- http://studiocommercialedelpiano.it/userfiles/files/4991733121.pdfIn PDF document text
- https://adverto.ee/userfiles/file/jezeburisaj.pdfIn PDF document text
- http://paramountswimwear.com/userfiles/files/newiwofagi.pdfIn PDF document text
- https://tdfstore.it/file/2215119267.pdfIn PDF document text
- https://sangolongphuong.vn/longphuong/news/files/miguxakodebipujuneg.pdfIn PDF document text
- https://eastmangroupllc.net/ckfinder/userfiles/files/6767667326.pdfIn PDF document text
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/18601ce4a3e1581f9f1fb0dee24fcf39/wuvonoven.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_off0000c26f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC26F	10652 bytes
SHA-256: `29ae68690687e4d2b28fc357df2df6e9d997e95a39d18d975126c614a7375129`
`font_01_sfnt_off0000daf2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAF2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f304.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF304	18200 bytes
SHA-256: `96e8c7b444c9a981ef5cf08a4d75c4d4e584ca2d4c78507aa0eb3d906c225410`

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