PDF malware analysis — malicious · 80c466234e0d6475

MALICIOUS

PDF

82.5 KB Created: 2021-08-30 07:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27

MD5: 0219cd520252819dc1dcd8082aabf6b1 SHA-1: d36f7f511438b3083492aaa5fb5c18eb2e5b5de2 SHA-256: 80c466234e0d647534062d30dd1349e0050fbdba7d44535afc3d3029e476716d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to compromised websites, including WordPress uploads and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates a likely attempt to distribute malware or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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://coretry.ru/uplcv?utm_term=complete+the+sentence+with+the+correct+answer PDF link annotation
- http://shop-cartuning.pl/userfiles/file/61329653998.pdfIn PDF document text
- http://www.anclupnapoli.it/userfiles/file/fibupepuwolaju.pdfIn PDF document text
- https://almoheetmanpower.com/public_html/userfiles/file/vasamakugaz.pdfIn PDF document text
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5tv676m25bkh7v4bjp583rjjj7/98787236186.pdfIn PDF document text
- http://cioccolatogallucci.it/userfiles/file/nejebunapa.pdfIn PDF document text
- https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/e92pub6rol3huul3061kbtu2rn/pevenavunupetinolesared.pdfIn PDF document text
- http://studiolauramoschini.it/userfiles/files/fusevogasawakatakesuzexu.pdfIn PDF document text
- http://teakdeck.pl/files/file/kuxumivisufekubezepijar.pdfIn PDF document text
- https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/24142851539.pdfIn PDF document text
- https://tunhuaduytan.com/upload/userfiles/files/rapudanomugok.pdfIn PDF document text
- http://www.shjkyq.com/up_files/FCK/file/jowedejapa.pdfIn PDF document text
- https://dolupin.com/calisma2/files/uploads/junuwiriridiwujagulemi.pdfIn PDF document text
- https://chambres-hotes-aube-bleue.fr/userfiles/file/piwawogimiwijemeketof.pdfIn PDF document text
- https://marcuspietrek.de/MARCUS/files/file/47824485175.pdfIn PDF document text
- http://czdashan.cn/uploadfile/file/2021062605425473499.pdfIn PDF document text
- http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160780f69592b4---69124508806.pdfIn PDF document text
- https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/d15d0b882b3a7d5f27e1e0a6e2e3c24f/48332607368.pdfIn PDF document text
- http://honyi.tw/ckfinder/userfiles/file/pulagonujukubuxaxul.pdfIn PDF document text
- http://albatrossmrn.com/konadnew/userfiles/file/47140924045.pdfIn PDF document text
- http://architettorobertafasola.eu/userfiles/files/rirexodi.pdfIn PDF document text
- https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/f4d5054d594111918b398ae465063543/likojopaxitigoxavi.pdfIn PDF document text
- https://apgr.eu/UserFiles/file/nobumiramibeke.pdfIn PDF document text
- https://manuscripthandler.com/userfiles/file/78559008419.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_off0000defd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEFD	10756 bytes
SHA-256: `ceae43a1c988d1d56582663efdbeb395199d059cd0c8e771a03805e61f4c7d19`
`font_01_sfnt_off0000f79d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF79D	16804 bytes
SHA-256: `84304a4019761edef001b66bf6be9341a6d5d8f6ddcd2f41603b847493b743dd`
`font_02_sfnt_off0001230a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1230A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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