PDF malware analysis — malicious · d2e566581eb2ad4f

MALICIOUS

PDF

76.1 KB Created: 2021-09-25 07:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 889d7463900dd7d3e4b60ed3a977c74b SHA-1: 7d1d788e99c188f5987550f674e735e78393f8ed SHA-256: d2e566581eb2ad4ff7ee6f26a684981600df80cea0c5cdc808e10b73ce45ae9f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9901

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://laborke.ru/uplcv?utm_term=how+to+get+deleted+photos+back+on+your+phone PDF link annotation
- https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142b68a723bd---kefinovutalilemebikuz.pdfIn PDF document text
- https://am-system.eu/ckfinder/userfiles/files/dekakotitosajipiru.pdfIn PDF document text
- https://ikuseikyokai.jp/ckmedia/files/54528193938.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/sarepezubonazifibiwixiz.pdfIn PDF document text
- https://embassyinvietnam.com/webroot/img/files/13180882631.pdfIn PDF document text
- http://parcroyale.hk/userfiles/kozonozelamafububafaron.pdfIn PDF document text
- http://archidaldegan.eu/userfiles/files/81852959894.pdfIn PDF document text
- https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/3f05da12dac52153863e495d101abf55/37987587493.pdfIn PDF document text
- http://greenld.com/userfiles/57285486849.pdfIn PDF document text
- http://ihdbd.org/upload/files/25970995878.pdfIn PDF document text
- http://precisao.org/files/files/3885055368.pdfIn PDF document text
- https://cuisinescartier.ca/upload/editor/file/vemusatokekonusem.pdfIn PDF document text
- http://marinapogon.pl/upload/file/makebovekafaximi.pdfIn PDF document text
- https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b8d61a497a---7676401910.pdfIn PDF document text
- http://dietetyka-24.pl/images/files/7324331790.pdfIn PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136554f41b51---sawivapewebofewaxeja.pdfIn PDF document text
- http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22174851793.pdfIn PDF document text
- http://desushibar.com/userfiles/file/43386105980.pdfIn PDF document text
- http://saothienemb.com/uploads/images/files/podiwim.pdfIn PDF document text
- http://gramercy-grand.ru/files/file/luzemoduxivewezelojafakor.pdfIn PDF document text
- http://mdbim.pl/ubezpiecz/obrazy/file/635367560.pdfIn PDF document text
- https://whatproperty.ng/ckfinder/userfiles/files/wegikezapelituxozo.pdfIn PDF document text
- https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/fovurifidimunidomeguned.pdfIn PDF document text
- https://agrimal.pl/userfiles/file/24883588944.pdfIn PDF document text
- http://valosagoskincsesbanya.com/upload/file/dikatomad.pdfIn PDF document text
- https://ifbscalidad.eus/files/galeria/files/zawatukupoviveso.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612e99b3e8166---30896299475.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_off0000bf4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF4E	18952 bytes
SHA-256: `b03e924a042ab652a5601c3650ebd3241c7b344d1ba74eafd93e01810159bab9`
`font_01_sfnt_off0000f021.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF021	11224 bytes
SHA-256: `10b8ce43290039c4175f6b0b804ca74bc0cad3de38cd06e7c79afa0d8bc4f020`
`font_02_sfnt_off00010a0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A0D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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