PDF malware analysis — malicious · 79826a3f3d782d6a

MALICIOUS

PDF

89.4 KB Created: 2021-07-02 23:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 7a99a1984540d8c71ec4da256d5dbe1b SHA-1: a113a3e9820fa0c36400518ca125e799e4ff1c8d SHA-256: 79826a3f3d782d6a30e8d2a5b19db16df11dce328f300ba014fcd02ccf7bf5f1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites, likely for further payload delivery or credential harvesting. The presence of embedded URLs and the structure of the PDF suggest an attempt to exploit users through deceptive links.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://pistant.ru/uplcv?utm_term=altitude+sickness+infant PDF link annotation
- https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8d2cd3363---14509767935.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832eab3339c---zifuwuf.pdfIn PDF document text
- https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160ddab4a718f3---suxepitamagurisiba.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/e0b64124b35c7aed1ebf8eeeb3e321bf/kozopif.pdfIn PDF document text
- http://barcelonahotel.vn/UpLoadFile/file/17052200995.pdfIn PDF document text
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/6aa138c50efe0f88e64d2153a5c2d241/67173545837.pdfIn PDF document text
- https://akapacha.com/userfiles/file/82549117337.pdfIn PDF document text
- https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077ecef2e991---mefogeganur.pdfIn PDF document text
- https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/kqm07jr9r98bfjl9b2sb0mi4u4/nodoxaxilus.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d8799e102---dovewuzikemame.pdfIn PDF document text
- http://ctnphrae.com/ckfinder/userfiles/files/nijuv.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3577b308d---47981863157.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dd696f59129---votusavodoviduxiju.pdfIn PDF document text
- http://dgjst.com/upfile/file/dagodokawuzibozipurikosu.pdfIn PDF document text
- https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/pap3ejj8117q63v7td831sopj0/3472063569.pdfIn PDF document text
- http://zrdb-drogbud.pl/Upload/file/japodojukatadepapezeme.pdfIn PDF document text
- http://orderkai.com/uploads/files/kazuwukazibazalonodo.pdfIn PDF document text
- https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160782ba827519---gawowuwaver.pdfIn PDF document text
- http://gourmethousemacau.com/UploadFilesfile///potujebagetokevuroguja.pdfIn PDF document text
- http://guojingmall.com/userfiles/file///6553271447.pdfIn PDF document text
- https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075de52d9b71---1567445909.pdfIn PDF document text
- http://jouezadomicile.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/gamaposasakavepaselixi.pdfIn PDF document text
- http://linkingpeople.info/userfiles/file/47332154467.pdfIn PDF document text
- http://lukoilmarine.com/ckfinder/userfiles/files/lokipozo.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_off0000fa3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA3E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011250.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11250	17792 bytes
SHA-256: `405ea7240e01c1418944f8f6b062dcc0987b3278d3a5f83a21f5b08b148f7249`
`font_02_sfnt_off000140a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x140A7	10420 bytes
SHA-256: `b0ee05de36eeccbe0aaa3627716c4560a1f7183d6dc847983e3de42b0beda4f4`

Open this report in the interactive analyzer, or submit your own file for analysis.