PDF malware analysis — malicious · 6afdb33f60cb99f5

MALICIOUS

PDF

92.7 KB Created: 2021-06-29 02:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 1dfc17efa852707f701246b7931f0b69 SHA-1: d5d67ae7bae1d387f40a8050dc4f806deeb8ada8 SHA-256: 6afdb33f60cb99f57f3ff0dc88d87e294f71ab8860c3cb1284517bc1cb882d0e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing lures or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads or redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://pixomot.ru/uplcv?utm_term=oxford+advanced+learner%27s+dictionary+10th+edition+pdf PDF link annotation
- http://lutechmed.com/Images_upload/files/vunug.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c51b3741155---fuwilita.pdfIn PDF document text
- https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c835d82b4b---57774984280.pdfIn PDF document text
- http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16078b51c0a121---70547532891.pdfIn PDF document text
- https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/95280988357.pdfIn PDF document text
- http://flirdining.com/uploads/files/nuleriraxir.pdfIn PDF document text
- https://pharma-tools.eu/galeria/file/zaliruxomusuz.pdfIn PDF document text
- http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607925f3ea5da---87008129896.pdfIn PDF document text
- https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867239846f0---54538138849.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/n9apik32c220cu1m84lbaevf1h/6825841753.pdfIn PDF document text
- http://altelaw.com/uploads/image/file/24857065531.pdfIn PDF document text
- https://puppometalli.eu/file/60956923278.pdfIn PDF document text
- https://ahreco.com/uploads/news_file/91464277277.pdfIn PDF document text
- http://curtisfamilyfun.net/clients/e/e0/e02f67ab5b6879a7eb6c21a3163f7106/File/90623705167.pdfIn PDF document text
- https://benqmusicworkshop.com/fupload/file/bajivuvo.pdfIn PDF document text
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754a605c1fa---79550201608.pdfIn PDF document text
- http://vhs1970.com/clients/873287/File/50859286440.pdfIn PDF document text
- https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/6ae3019e928ec8663c5fd5ab79d37c0a/mibarenelapetul.pdfIn PDF document text
- http://teleinwestor.com/userfiles/file/35338410146.pdfIn PDF document text
- http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160719fab42de4---74979292266.pdfIn PDF document text
- http://entone.es/wp-content/plugins/super-forms/uploads/php/files/437e410fc136fba3f8b156a4dde853c0/zajupozom.pdfIn PDF document text
- https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/d68eed3cc1a529e8a1084f3dedd2606a/fetojusapepisodukata.pdfIn PDF document text
- https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071ca2671773---nutuwovomeka.pdfIn PDF document text
- https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/bdb6573655b8282a05adda503dc720cb/37154051205.pdfIn PDF document text
- https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9be61f116b7f68239d2e7e5a01968bde/70602529498.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/fa3c63fbbb1d9fe1d1e23fddf9be71ad/loduwexe.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_off0000f840.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF840	11232 bytes
SHA-256: `f71f2da58c541fb42bcbd36f76e78506a7f7377f195a2d05f4ed7fbbbea5d010`
`font_01_sfnt_off000112a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112A4	27792 bytes
SHA-256: `320604a53536c8eaee182d1c406eeccdff1255deafc838ff88c5c3e4e089c9bc`
`font_02_sfnt_off00014c97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14C97	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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