PDF malware analysis — malicious · bf5b7324c434c7ad

MALICIOUS

PDF

88.5 KB Created: 2021-07-02 00:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 135f76f44c65d91f0db989f0358702e1 SHA-1: a8cf66c0bbf0fd27adf9b1fe06efd20f004644a3 SHA-256: bf5b7324c434c7ad9d018b2cb17c2a480a5aae458133fa1bf2fc3405b4705819

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV also detecting it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites, suggesting a phishing or malware distribution scheme. The file's structure indicates it's a link farm designed to redirect users to these potentially harmful 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://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/pqmpvd7ploh1nruam7hppaosk4/66676658707.pdf In PDF document text
- https://dpmceramiche.it/file/genedubikalezolakoravi.pdfIn PDF document text
- https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/cbjfr1gdbqmh24dbaagfql2sb6/diwifekivurivajapufiru.pdfIn PDF document text
- https://geneticapanama.com/userfiles/file/28917552277.pdfIn PDF document text
- http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/1qajr1nct0pmbfoscndouei3qf/nufaxazewukofibub.pdfIn PDF document text
- https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/950a28529f2f4aaa57dbfd971d6ed615/soxutu.pdfIn PDF document text
- http://winso.tw/userfiles/file/xafibabotijesuboxubotis.pdfIn PDF document text
- http://dagmar-e.de/userfiles/file/wegemotawekimaf.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fec39b9c73---fesemanudijidaferono.pdfIn PDF document text
- http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160738d80ad8bc---duxilufafadozotosezunis.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a333cdd8a1d---nupekikifesiligitolijuwu.pdfIn PDF document text
- http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/ihogbvo9o5rhnv03jqloi5dv1b/72438634102.pdfIn PDF document text
- http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/guvefonoru.pdfIn PDF document text
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a85b968cc0d---gokivewosovazuredila.pdfIn PDF document text
- http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e0b7019e2---vimegojot.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b056836d7---tamidopatotupaliduxu.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/b618fc6064be3e30ebd1d8fcfb0af5aa/26068767773.pdfIn PDF document text
- http://caratow.nl/userfiles/file/85046023638.pdfIn PDF document text
- https://alshamiltrading.com/alshamilfiles/file/99833024105.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8ec44d310---40013451290.pdfIn PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddf695334ab---gadesitexolox.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6cb97d631.pdfIn PDF document text
- http://jewfri.kr/files/image/files/sawifowimokugu.pdfIn PDF document text
- http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072c769e1596---53661166390.pdfIn PDF document text
- https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607169e53d902---wupidewufop.pdfIn PDF document text
- https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12cd0e403c---lepafizalonedasod.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=phe+chapter+1+class+12PDF 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_off0000f8b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8B6	10328 bytes
SHA-256: `2392d8f7b3df82d5e76edbad678c65e4d2e6cee2bb4a84ae3188fe44c11c0975`
`font_01_sfnt_off0001104c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1104C	16956 bytes
SHA-256: `3ab4eb205b36dc4ad7f50545bfbdd86cb897c24e299af2484c638e9b1fbc9691`
`font_02_sfnt_off00013c98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C98	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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