PDF malware analysis — malicious · e5f550fc96d267ef

MALICIOUS

PDF

91.8 KB Created: 2021-09-07 08:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 57cb07278c159c2613f45cf36aa8b17e SHA-1: b0ef0d133cad9f0c6ff5685b002d89e4bb583249 SHA-256: e5f550fc96d267ef1345857cec81c5d5b47d03105a48f707e8d09373ed0843e8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. The file's structure and URL patterns are consistent with a link farm designed to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9702

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://imagebeaute.fr/userfiles/file/42538601877.pdf In PDF document text
- https://cevhertemizlik.com/userfiles/files/15960049894.pdfIn PDF document text
- https://lawina-radom.pl/files/file/35337078244.pdfIn PDF document text
- http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/77959ed5af007e8a22099362a4741790/nozikowategobad.pdfIn PDF document text
- http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/b97819aefdb616f17c4e9f59c5f9ee8d/73163708877.pdfIn PDF document text
- http://guowangcable.com/d/files/41612171182.pdfIn PDF document text
- http://vom-ragnaroek.de/uploads/file/47568823978.pdfIn PDF document text
- https://mamo-tato.ro/userfiles/file/5471804926.pdfIn PDF document text
- https://newegys.egyseg.eu/ckfinder/userfiles/files/jazerimajobuvozepuk.pdfIn PDF document text
- http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc61a26dbd3---gawuniganesasomefepopoxom.pdfIn PDF document text
- http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/1102940794.pdfIn PDF document text
- https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/6oeal4dl5ot29pgroq8iemd3t7/jusixu.pdfIn PDF document text
- http://packturf.fr/files/lamizidudenige.pdfIn PDF document text
- https://anthonygillant.com/userfiles/file/23315030701.pdfIn PDF document text
- https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abfeb76ea7e---60479937922.pdfIn PDF document text
- http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113cdde4eb6c---41414161420.pdfIn PDF document text
- http://smartpaintingplus.com/userfiles/files/96858881813.pdfIn PDF document text
- http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612d796770f99---2460113545.pdfIn PDF document text
- https://cplastik.com/data/cms/file/liwowu.pdfIn PDF document text
- http://limoride.net/gallery/file/rafazozenano.pdfIn PDF document text
- http://vpecargo.com/userfiles/file/xumexotogazagapojeve.pdfIn PDF document text
- http://rehahomecare.com/upload/editor/files/32450249634.pdfIn PDF document text
- https://wtmasonry.com/ckfinder/userfiles/files/womowokirifupujejino.pdfIn PDF document text
- http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/qp5s4pm5bgh1tcopdkpfrcn0a1/8643907180.pdfIn PDF document text
- http://solarexperten.ch/fckeditor/editor/images/file/57614538196.pdfIn PDF document text
- https://rkdestate.com/userfiles/file/fatizaxoroti.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=%D8%AA%D8%AD%D9%85%D9%8A%D9%84+%D8%A8%D8%B1%D9%86%D8%A7%D9%85%D8%AC+pdf+%D8%B9%D8%B1%D8%A8%D9%8A+%D8%A8%D8%B1%D8%A7%D8%A8%D8%B7+%D9%85%D8%A8%D8%A7%D8%B4%D8%B1PDF 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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off0000c6e9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xC6E9	23148 bytes
SHA-256: `ce93e2e243d75dece7c06357f1ecb2c2fb514a5b03c542b755ea72ba480bebac`
`font_01_sfnt_off0000ef5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF5B	1664 bytes
SHA-256: `c737c1571b827a9af515084efd4d135d2c05ce8763284746c5506df3322eddb3`
`font_02_sfnt_off0000f746.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF746	9372 bytes
SHA-256: `ab692011bb810b4091e5b6863c1468cc19624005727076e0e42723678ec61724`
`font_03_sfnt_off00010b25.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B25	20520 bytes
SHA-256: `eefbe19a00f2895e23f194adc2eb4929336db27b061890cf427703f489ade282`
`font_04_sfnt_off00013ec3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13EC3	18772 bytes
SHA-256: `aa65f82527d4f61949cf0064fddfa974e5510b628e62fc7de3ee0184f054b584`

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