PDF malware analysis — malicious · 74c2f0ee4e18b60e

MALICIOUS

PDF

86.5 KB Created: 2021-07-31 23:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: c17c314f1c644b8f497b20fcf5e761b9 SHA-1: 9653bb2981d269def211cf2768458367ca41cfc1 SHA-256: 74c2f0ee4e18b60e644fec7cf3b916abef7c90cb83dbaec8c3cd1d940c75592f

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains. The ML classifier strongly indicated maliciousness, and the heuristics suggest the document is designed to direct users to external, potentially malicious, content. No scripts were extracted, but the extensive use of external links indicates a likely intent to redirect users for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

Heuristics 5

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://laborke.ru/uplcv?utm_term=introduccion+a+la+psicologia+charles+morris+duodecima+edicion PDF link annotation
- http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/93925100465.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/6c608a8dff9ed8a665612027c5ed7202/fowibodonadutadudonew.pdfIn PDF document text
- https://dubaimotorcycletours.com/uploaded_images/files/548052726.pdfIn PDF document text
- http://posekatzahradu.cz/files/file/6235190083.pdfIn PDF document text
- https://agatanorek.com/files/file/60163409824.pdfIn PDF document text
- http://circuitoinsulargc.com/documentos/file/21002950356.pdfIn PDF document text
- http://arredamenticucinesiciliane.it/userfiles/files/sivikexizuzisasemezup.pdfIn PDF document text
- http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/366b1412c201c5c8312e7d7a6808b511/54939743978.pdfIn PDF document text
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/b60648161987b0d579e7575b355118fe/57945733104.pdfIn PDF document text
- http://blankheich.de/images/uploads/file/64751485769.pdfIn PDF document text
- https://protradingindia.net/userfiles/file/71504934951.pdfIn PDF document text
- http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bb297508d---giluwefiba.pdfIn PDF document text
- http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9e0c2e967---65376620450.pdfIn PDF document text
- http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fa0821b97---rojifupitufi.pdfIn PDF document text
- https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/0irvgpnmg5rmi6eba2t85iv4ml/pulexeninurororevafuw.pdfIn PDF document text
- http://cestovni-postylka.eu/userfiles/file/41673369574.pdfIn PDF document text
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/f38ba8gjh56vnaovrepi7linkd/mijovifokebe.pdfIn PDF document text
- https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/3ee3612c50d16abb752e6dc518f7b828/73383788016.pdfIn PDF document text
- http://rencontres-icare.org/userfiles/file/1539593753.pdfIn PDF document text
- http://positiveforce.in/uploads/files/40993100650.pdfIn PDF document text
- http://alnoorcity.com/userfiles/file/nowujijagarunitetune.pdfIn PDF document text
- http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wizibo.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ec4f91afd---kitirenitus.pdfIn PDF document text
- https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/b046488e579edaa64ed0061a7c90aa44/36339680576.pdfIn PDF document text
- http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/vrl4rdu7joqguoafca46qd64i3/xabuzolerura.pdfIn PDF document text
- http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/ca5146b151739760eb866b2cc258be77/31292684438.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_off0000e9dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9DC	11012 bytes
SHA-256: `29118eec02fe77274fb4e5a83303e34c2e98d198ff75939d17bf04e5a5b99559`
`font_01_sfnt_off00010309.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10309	18264 bytes
SHA-256: `d278800dd326841e61f89e9b0f0909536bda957c62e912e0922825c07ef9c21c`
`font_02_sfnt_off0001316f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1316F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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