PDF malware analysis — malicious · d8d175cd18278ee4

MALICIOUS

PDF

87.6 KB Created: 2021-09-02 22:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: cca530439243eae656b182307df49e28 SHA-1: 67329b11a74598019992a7f5949e0d981459fca4 SHA-256: d8d175cd18278ee4c7cb2e5ede60517b603b5dc5ee49f416b3bec3ea9a22ac1a

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. It contains numerous embedded URLs pointing to compromised websites, suggesting a phishing or malware distribution scheme. The heuristics indicate the PDF is part of a link farm hosted on compromised CMS uploads, likely to obscure the final malicious destination.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://huntic.ru/uplcv?utm_term=basic+concepts+of+managerial+economics+pdf PDF link annotation
- http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c641f844d48---31516684111.pdfIn PDF document text
- https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160cf0f25ee30d---1713845038.pdfIn PDF document text
- http://lukoilmarine.com/ckfinder/userfiles/files/lokipozo.pdfIn PDF document text
- http://bebelino.ru/userfiles/file/fepisarefebisusu.pdfIn PDF document text
- https://delaneyllc.com/ckfinder/userfiles/files/sulutoduru.pdfIn PDF document text
- http://rocincorporated.com/domain.com/images/dynamic_pages/file/dimisatebodemarabadized.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/68f79d3e96395ca3dfb779c0300a7873/41586695889.pdfIn PDF document text
- http://khodahoanglang.com/admin/webroot/upload/image/files/90351758755.pdfIn PDF document text
- http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b48a3719d---nigutusisaserevesorako.pdfIn PDF document text
- https://medosojewellery.com/userfiles/files/62545673872.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12c565fb0e---dupofepefusejedudupim.pdfIn PDF document text
- https://truonggiangcompany.com/userfiles/file/romorabopufigegepatoba.pdfIn PDF document text
- https://bistakalikotenetwork.com/userfiles/file/dofexufeditodupopa.pdfIn PDF document text
- http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/rilopaxidoparim.pdfIn PDF document text
- https://autoparkalbanese.it/file/vopagevamefow.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2895ddc85---xokik.pdfIn PDF document text
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160acc098b61ec---rolekezomodifukujejafel.pdfIn PDF document text
- https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/b7ri16il65aelaevj2c6qpif9q/nenuwivabowimejegiboxa.pdfIn PDF document text
- http://www.jindatunnel.com/up_files/file/fivapobekowi.pdfIn PDF document text
- http://alnoorcity.com/userfiles/file/18779589574.pdfIn PDF document text
- http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/20090389102.pdfIn PDF document text
- https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/61bf7201032b114c0345a4203c4aa447/88396742514.pdfIn PDF document text
- http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c15e2673f72---2747892799.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7744c06c7---728609927.pdfIn PDF document text
- http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd8ba5d675---navagapimireviz.pdfIn PDF document text
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608eab16a2d91---54051582706.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_off0000f022.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF022	17896 bytes
SHA-256: `471478d501312772c8393780d9ff60591eb0fcb5cc42b3ae7b25ddd28317c203`
`font_01_sfnt_off00011ec4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EC4	11016 bytes
SHA-256: `3bb95338205d8feeb89a678dca8faf4c2c061eba1d36bd2086afc46818894cd7`
`font_02_sfnt_off0001382c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1382C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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