PDF malware analysis — malicious · 748bf29e01b6d745

MALICIOUS

PDF

85.0 KB Created: 2021-09-11 23:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 086ee5d83c97eb7e6eda94598e1bd9c4 SHA-1: edb41de24f374f76211439b236902f70de0274da SHA-256: 748bf29e01b6d745c67569b58a640480603e2292002b3b77eb0a892d24ccb419

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains numerous embedded URLs that form a link farm, directing users to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to phishing or potentially malicious content through these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 https://pixomot.ru/uplcv?utm_term=best+android+online+games+2020 PDF link annotation
- http://cathugo-catamarans.de/res/wysiwyg/file/76405773934.pdfIn PDF document text
- http://mdsalon.ru/img/lib/file/11572430831.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/68937dcc0c2eb0ecfccdbe083b362514/1289695133.pdfIn PDF document text
- https://hssanesteban.cl/files/leselopawabivipudukuxar.pdfIn PDF document text
- http://radecznica.pl/userfiles/file/41361755805.pdfIn PDF document text
- http://rapabzenec.cz/obrazky/files/86118025883.pdfIn PDF document text
- http://sanalights.com/admin/admin/uploadfiles/file/78020855785.pdfIn PDF document text
- https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613506c7eed14---55814729061.pdfIn PDF document text
- http://kodemari.info/data/files/40765019665.pdfIn PDF document text
- http://irodaszer.lukinserv.hu/file/sevijazawa.pdfIn PDF document text
- https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/59dfaec1f8e5599dcee3c25c7dd27108/98906799840.pdfIn PDF document text
- https://holocaustresearch.pl/nowy/photo/file/28070178561.pdfIn PDF document text
- https://demo-calson.garment-pro.com/ckfinder/userfiles/files/wisodadabe.pdfIn PDF document text
- https://sausalito.com/wysiwygfiles/file/36915158883.pdfIn PDF document text
- https://kaptenhoki.net/contents/files/38979952768.pdfIn PDF document text
- https://www.aaptuk.org/ckfinder/userfiles/files/88960874607.pdfIn PDF document text
- http://primeasset.hu/fileok/file/duxuzanasuboluxikawijed.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613169a65e2f8---wejejisokuvobasozu.pdfIn PDF document text
- http://kondicionery-dolgoprudny.ru/upload_picture/file/sufej.pdfIn PDF document text
- https://perfecthospital.org/ckfinder/userfiles/files/vufifopafobiraxomefagez.pdfIn PDF document text
- https://partnyor.az/userfiles/file/lutakakekixilunutipapuja.pdfIn PDF document text
- https://landtop.com/filespath/files/20210909151026.pdfIn PDF document text
- http://hani-bee.com/userfiles/files/dawujibajenemelivobo.pdfIn PDF document text
- https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/af6114f9116eaba177439250bd74483f/kulokenatosukaxelo.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_off0000e65a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE65A	10884 bytes
SHA-256: `7a6772411c9493688791347a97c2bae69bf23b204294b8507dfb0952c264135f`
`font_01_sfnt_off0000ff5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF5B	17944 bytes
SHA-256: `1bb4512ea8617716e2eee2060df7bca1ea44c98ffdc4836ec620266625182eac`
`font_02_sfnt_off00012e63.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E63	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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