PDF malware analysis — malicious · dcec6d80f771cd8b

MALICIOUS

PDF

73.2 KB Created: 2021-09-16 19:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 2d63a257be1f789a9f118709f4d19811 SHA-1: 232cb46e7e3acd89b7def0aa821a0455f36505e2 SHA-256: dcec6d80f771cd8bf79f07b799bea12fdf77de99faacea4982259930d36b8a88

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. The presence of numerous external URIs, many hosted on disposable domains and forming a link farm, indicates a phishing or redirection attempt. The 'SE_DOWNLOAD_BUTTON' heuristic suggests a deceptive call-to-action, likely intended to trick users into downloading a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://philabc.ru/uplcv?utm_term=metal+gear+solid+psx+rom PDF link annotation
- https://sukhayurveda.in/userfiles/file/dexiwufadevexivup.pdfIn PDF document text
- https://sts-cct.com/app/webroot/userfiles/files/sipesefatetobeze.pdfIn PDF document text
- http://bayanairag.com/uploads/userfiles/files/69640575255.pdfIn PDF document text
- http://my-hustle.net/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/80604804049.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/41756922714.pdfIn PDF document text
- https://mygenius.ru/admin/ckfinder/userfiles/files/26667264833.pdfIn PDF document text
- http://sdes.in/uploads/gemis.pdfIn PDF document text
- http://abwnickersonplaza.com/uploads/files/1478441672.pdfIn PDF document text
- https://carsen.sk/editor_uploads/system/files/64576507605.pdfIn PDF document text
- http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/xolobikox.pdfIn PDF document text
- https://groupekineconcept.com/userfiles/file/pugituk.pdfIn PDF document text
- https://tonwen.org/userfiles/file/34129338298.pdfIn PDF document text
- http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/lfl4ds0vjdnt3esu1c1ka8l6d4/lebanegu.pdfIn PDF document text
- http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b17a912606---82140197205.pdfIn PDF document text
- https://watfordfairtrade.org/app/webroot/img/files/55165032117.pdfIn PDF document text
- https://rajakedua.com/contents/files/jupofenawasojo.pdfIn PDF document text
- http://le-nora.com/userfiles/file/22513469954.pdfIn PDF document text
- https://simorgh.it/uploads/file/93988045573.pdfIn PDF document text
- http://berbun.com/user_img/file/rexasalumegax.pdfIn PDF document text
- https://tylbm.com/Upload/ckeditor/files/24829575623.pdfIn PDF document text
- https://allora-tour.by/var/upload/file/58237925039.pdfIn PDF document text
- https://asset-books.com/userfiles/file/sivubepaluleriduni.pdfIn PDF document text
- http://asdgolfclubtoscana.com/writable/public/userfiles/file/85028927379.pdfIn PDF document text
- http://monthclean.com/uploads/files/202109151938396018.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_off0000b936.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB936	10728 bytes
SHA-256: `aaff85e06fc7a5912067d7c5b371ad7c23c2abbfae96bb7bf399a3c988dba4ae`
`font_01_sfnt_off0000d1ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1AD	17388 bytes
SHA-256: `d6d45ef6c6eed8a954c3022e5e179cb32a8d49c95557906388baefa6a956d346`
`font_02_sfnt_off0000fecc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFECC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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