PDF malware analysis — malicious · db0025dc70fe7d14

MALICIOUS

PDF

91.6 KB Created: 2021-08-16 19:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 35a5ab36bc90a2b81edaf4bea995e8c8 SHA-1: d98116fdb03be8b79a35d9493de92515e3d5873c SHA-256: db0025dc70fe7d14d396ce3787b93b88d9e7adc17207b81d14fd68ac3b04420d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identify it as a link farm hosted on compromised CMS uploads, with numerous distinct hosts and URLs pointing to PDF files. While no scripts were extracted, the structure and URL patterns suggest it's intended to lure users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f9a3299044e---kilavoxo.pdf In PDF document text
- http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/92711580582.pdfIn PDF document text
- http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1611a888fdaad5---48452522167.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d150c79b774c43b57805e3a0ac1be537/89902454321.pdfIn PDF document text
- http://myshopgroup.com/userfiles/files/fasimunopakamudex.pdfIn PDF document text
- https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/eo6qqg939irud6i2u2lubngs0o/36747481743.pdfIn PDF document text
- https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccd40e4ff5---98251050274.pdfIn PDF document text
- https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16088d34b5bd99---kifimipisijal.pdfIn PDF document text
- https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/1qh6ll85oslhm0psr8l9h6ven7/39525928462.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/7ad77011da4182e5a0e21d56ab0515ee/93850921843.pdfIn PDF document text
- http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160992126e4baf---fixekipasuzamodabisatob.pdfIn PDF document text
- http://driver-jazda.pl/upload/file/56907875477.pdfIn PDF document text
- https://samarpanbharat.org/trila/userfiles/file/toruji.pdfIn PDF document text
- https://volandovia.it/public/fileeditor/file/84031000351.pdfIn PDF document text
- https://irastuff.com/admin/ckfinder/uploads/files/87141597069.pdfIn PDF document text
- http://ramenzoni.eu/userfiles/files/gobutifuwatopazire.pdfIn PDF document text
- https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087231e987d5---12504908564.pdfIn PDF document text
- http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f5461ead16b---xupoloxufefutiwani.pdfIn PDF document text
- http://cn-daomeng.com/upload/userfiles/files/e3b73d93f6f73c2e6655526a591e8c07.pdfIn PDF document text
- http://jiangsutravel.kr/userfiles/files/20210609_135120.pdfIn PDF document text
- https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f48e60fb32---nekufibovufigokejebaz.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/24232b4ccf48ccdcff020a375638dc6d/91457770562.pdfIn PDF document text
- https://hantverkarenisandby.se/UserFiles/files/58598046601.pdfIn PDF document text
- http://gibisch.com/files/files/jelolawadelotegeledaju.pdfIn PDF document text
- https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/b1c5ecgj4g50p2ijhlm1mollk0/nubugumamekudupon.pdfIn PDF document text
- https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/c65e27dda80563171ca43322fa881e15/nemefu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=round+lounge+chair+cad+blockPDF 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_off0000f567.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF567	10760 bytes
SHA-256: `51dcf9467ee24b6a575f812a288c03227c0f7184441539036be1d5eedb3f299b`
`font_01_sfnt_off00010dcb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DCB	22476 bytes
SHA-256: `99f74749d51fc556ff666a4276ec65fa94c2e570bfa11451586f6c6baf17f4e8`
`font_02_sfnt_off000147fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x147FE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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