PDF malware analysis — malicious · f45e9d651f8ab6ca

MALICIOUS

PDF

84.7 KB Created: 2021-09-04 02:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 036c74d36cc0e20451714cbd4b898a3b SHA-1: 9ff346c2f13da345111cb4cf3ab414e2ebf6492a SHA-256: f45e9d651f8ab6caa6b739c21c31fa4074c69b543abc4a9d6782b2a748e1126f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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 http://solarissoft.com/img/userfiles/files/9924552063.pdf In PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ts7vp1ohionhd7tc74mrdip5h5/27978825066.pdfIn PDF document text
- http://lyshiying.com/d/files/47127293187.pdfIn PDF document text
- http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607182853f05f---mojitigab.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608621060a42b---32546679816.pdfIn PDF document text
- http://zpb-maciejewski.pl/upload/fck/file/56296864651.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff48d06031---91288174429.pdfIn PDF document text
- https://dakhoathienhoa.net/images/files/67678880195.pdfIn PDF document text
- http://topflexsports.com/uploads/wetisuxemilezotatabujeduz.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9073e025a5---66859166838.pdfIn PDF document text
- https://xuantruongtech.com/images/ckeditor/files/58037656733.pdfIn PDF document text
- http://phuvuongcorp.com/luutru/files/forimo.pdfIn PDF document text
- http://tavaszitura.eu/userfiles/files/69096626200.pdfIn PDF document text
- http://www.heksan.com.pl/file/rakejapazijasivofeleb.pdfIn PDF document text
- http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10d84e5e21---xafopo.pdfIn PDF document text
- http://markasib.ru/ckfinder/userfiles/files/wamun.pdfIn PDF document text
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/lcrf34f0hnhdcuiuoobt76ovnu/zoxozapizubokobuligenis.pdfIn PDF document text
- http://simonide.org/userfiles/file/71501470528.pdfIn PDF document text
- https://coolinterier.sk/upload/files/20461075288.pdfIn PDF document text
- http://lobi.md/userfiles/file/85128437492.pdfIn PDF document text
- https://alutat.com/data/file/1615069959.pdfIn PDF document text
- https://travelworld.ro/userfiles/file/28903592733.pdfIn PDF document text
- https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/13522093b2793700a116b0c721c1a37a/jobenen.pdfIn PDF document text
- http://soupworld.de/upload/file/gumewerozero.pdfIn PDF document text
- http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/15233054953.pdfIn PDF document text
- http://studiocastigli.eu/userfiles/files/12094188066.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=formasi+cpns+kota+cirebon+2018+pdfPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e30c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE30C	17476 bytes
SHA-256: `e9b04bba808159a309884ee21192c51b959345bd49ac4b0204f62b5308602607`
`font_01_sfnt_off0001105f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1105F	11448 bytes
SHA-256: `9f69866fbcfc3aa02de9f68293a6416cbde6ec06b2fe526e24f79a4dd1081a0a`
`font_02_sfnt_off00012b45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B45	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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