PDF malware analysis — malicious · 0c0262e56b7c3a5d

MALICIOUS

PDF

81.7 KB Created: 2021-09-13 03:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: fd42f5d6ad59a60e32d342ba6e7b4ce5 SHA-1: b23269e98698d3b3230a61da5fadbf2e2769c249 SHA-256: 0c0262e56b7c3a5d4a2aedeb3d3c194b2c66f9ec9c80b9a61945de2a82418c19

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, forming a link farm. These links likely serve to redirect users to phishing pages or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://cylinder96.ru/admin/ckfinder/userfiles/files/45030205302.pdf In PDF document text
- http://www.aportecnica.com/imagenes/editor/file/nifalaxo.pdfIn PDF document text
- http://goteneplast.se/files/images/file/sitezen.pdfIn PDF document text
- http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9254b71ef---59421748550.pdfIn PDF document text
- http://loveperfectionschool.com/upload/file/domamadapijowilutibugozo.pdfIn PDF document text
- https://alrukn.co/userfiles/files/rojev.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d01314b97b---51376737644.pdfIn PDF document text
- http://kleinschadenexperte.de/userfiles/file/22735742749.pdfIn PDF document text
- https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161327d5de0eb6---supelebos.pdfIn PDF document text
- https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb3ee586f3---59378044572.pdfIn PDF document text
- https://healthmatters.me/userfiles/file/24170913356.pdfIn PDF document text
- https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/5a1bda13b36894fdc268383044e8174a/78660863761.pdfIn PDF document text
- http://thamcohoaian.com/webroot/img/files/99962887800.pdfIn PDF document text
- http://etabetasurvey.com/userfiles/files/95078077577.pdfIn PDF document text
- http://2013.letnifestiwal.pl/ckfinder/userfiles/files/tazaxavukekonizadamegiso.pdfIn PDF document text
- https://mptradingcompany.com/userfiles/file/88400952961.pdfIn PDF document text
- https://rocksoliddesigns.biz/userfiles/file/3559431355.pdfIn PDF document text
- https://casabresciani.it/uploads/file/sibijuxaxupav.pdfIn PDF document text
- http://travelci.ru/ckfinder/userfiles/files/wuzuxugusoxorop.pdfIn PDF document text
- https://gionggiacam.com/ckfinder/userfiles/files/74993827608.pdfIn PDF document text
- https://fond.ru/userfiles/file/vozokenesesevoneg.pdfIn PDF document text
- http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14148497330.pdfIn PDF document text
- http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a81717f8ee---47364009432.pdfIn PDF document text
- http://abarappresentanze.it/userfiles/files/suvezodezugedol.pdfIn PDF document text
- https://steklo-shik.ru/userfiles/file/jifates.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=can+you+retrieve+deleted+contacts+on+androidPDF 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_off0000d9c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9C8	17956 bytes
SHA-256: `df0251813e8e9c1d4b324b223735247089a676afa423a1106983b0283696ad59`
`font_01_sfnt_off000107c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107C7	10672 bytes
SHA-256: `d86a5b2d9cef2165c205874770176bf049f3c12c6db2f98434539f37d67edca6`
`font_02_sfnt_off00012071.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12071	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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