PDF malware analysis — malicious · 2318624544c8db0c

MALICIOUS

PDF

90.1 KB Created: 2021-08-11 19:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: c1a2bf8ff237e6c66aaffc6e69387a6e SHA-1: 66ef5926550e099eaa6c913ffdb7aacc9008cc76 SHA-256: 2318624544c8db0ca1c5349709b1e34536f28a7bc6a8e794e4136d9b6f3a05a1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and embedded URLs indicate it is likely used as a lure for phishing attacks or to distribute further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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://pistant.ru/uplcv?utm_term=acta+de+constitucion+de+un+proyecto+pdf PDF link annotation
- https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/6a499eb52e82c91916b2d8b5704413b1/forivibekigesewusetevip.pdfIn PDF document text
- http://residenzaeden-albisola.com/userfiles/files/samurutin.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/rijodutenubovabudufuri.pdfIn PDF document text
- http://studioingtassinari.eu/userfiles/files/8240892933.pdfIn PDF document text
- http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c129b7f278e---57824166687.pdfIn PDF document text
- http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c052e102dee---93719016987.pdfIn PDF document text
- https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/875374e3809e0fdb9bba4449f6f649f4/rirolovoxo.pdfIn PDF document text
- http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072020c2726f---mamerajatuwa.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608768bc351a2---15982436036.pdfIn PDF document text
- https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/904734a2e16f416a63bf9527a6a0a2a3/kenuvemoref.pdfIn PDF document text
- http://poorclarescork.ie/images/94791906011.pdfIn PDF document text
- http://aranykoronakft.hu/userfiles/file/1310997248.pdfIn PDF document text
- https://associazionedynamica.it/uploads/file/kapogavusosozoxemodibam.pdfIn PDF document text
- https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160acf4354095d---62140484254.pdfIn PDF document text
- http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/c54359539a5e12a7387de17a0ff9b7cb/69992987960.pdfIn PDF document text
- https://www.retake.dk/ckfinder/userfiles/files/78375530400.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad671892dc9---89875048106.pdfIn PDF document text
- https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782e31d84c1---63162143593.pdfIn PDF document text
- http://austintownfitch1980.com/clients/879833/File/91928421633.pdfIn PDF document text
- http://www.deep2001.com/images/library/File/bomumivuzu.pdfIn PDF document text
- https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a207a5fdc---maguvojef.pdfIn PDF document text
- http://photo-preiss.com/upload_files/files/bavezukazunanorogurofuvis.pdfIn PDF document text
- http://seoulgreeter.com/userData/board/file/93831714342.pdfIn PDF document text
- http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f316a508b3f---73093212154.pdfIn PDF document text
- https://bibliotheque-des-arts.com/ckfinder/userfiles/files/34968559294.pdfIn PDF document text
- https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a168c45d3eb---18735529463.pdfIn PDF document text
- http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/xumiwux.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_off0000f92c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF92C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001113e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1113E	17808 bytes
SHA-256: `c4dc61f69504e64015e78b2ea329987fde72677f49e1f17b258c555c12d72f76`
`font_02_sfnt_off00013ea6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13EA6	10760 bytes
SHA-256: `3ba8f4894e1a640c63d821cc526b68cd5259b3db7c6e14e4c27414ec7946057c`

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