PDF malware analysis — malicious · cd4a86df4ad3eeda

MALICIOUS

PDF

90.7 KB Created: 2021-08-01 22:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 5fb339b24b6661d056da7d91fdc5ca9d SHA-1: b5b2a9ede609b8e647e2b4c942f47125ab14d3f5 SHA-256: cd4a86df4ad3eeda9a221fef8bddc26547c06735cb18380ad292119f82c7d405

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to other PDF files, many hosted on compromised CMS uploads. The ML classifier strongly indicates maliciousness, and the structure suggests an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, but the PDF structure itself is the primary attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 5

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://paperland.bg/uploads/file/daregada.pdf In PDF document text
- http://findmecakes.com/userfiles/files/29589199874.pdfIn PDF document text
- https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/e461c94e9f40dd9c753fe96685ddc555/zutopesobivaz.pdfIn PDF document text
- http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c987a066c28---81065216512.pdfIn PDF document text
- https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/867a7877e0398e0d8751679098c1b4fa/binodu.pdfIn PDF document text
- https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/cdfcae5c6f8e3dbb8512b145b3c15d36/xinagusizetiv.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160dfbd2753bcd---dofizidugojil.pdfIn PDF document text
- https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102ff14b811a---jitavobilogategi.pdfIn PDF document text
- https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/fu4rt6k1gkahjtob29ktaf7145/53866409904.pdfIn PDF document text
- https://totalmediasolutions.ae/ckfinder/userfiles/files/59764692632.pdfIn PDF document text
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd80f0d4c8a---mitesaliwagavuve.pdfIn PDF document text
- https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/7cvq0dog01h1vacsl98vu65fc0/56530603908.pdfIn PDF document text
- https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/0d56c473026887dee1fb7030e36234e5/17310880796.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea97158cbd---89896961136.pdfIn PDF document text
- https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/dnhs9qt5kk18gc3s2dutn5emlr/18122673337.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607428462cf7e---wegavovitavexagopuvifuwak.pdfIn PDF document text
- http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d335f5e257---fazijejok.pdfIn PDF document text
- https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/9fb55dd4c2ba4e046425c40c53d10f12/tipul.pdfIn PDF document text
- http://work4shop.cz/userfiles/file/16129039357.pdfIn PDF document text
- http://iburgisidimarsala.eu/userfiles/files/80364350799.pdfIn PDF document text
- https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/s3g9qt99ielvaod9t23ife3ir4/kekog.pdfIn PDF document text
- http://stfrancisfrankford.com/clients/9/90/9051900d87e3fdd5bc97eff612ac54c4/File/dumapinajovo.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=egzamin+angielski+b2+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_off0000f98e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF98E	10920 bytes
SHA-256: `ec5bfc0c57a21c3270ccf0ad3c8cc7a92337e604eba2ffa837445d502dfea6d7`
`font_01_sfnt_off00011269.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11269	19496 bytes
SHA-256: `012390cb17d5b28625174e27771ce3a79d082a735667f2eb4b07a66689a79c64`
`font_02_sfnt_off0001433c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1433C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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