PDF malware analysis — malicious · 72c0bde0bd03955f

MALICIOUS

PDF

87.3 KB Created: 2021-09-02 11:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: edae7b6685ad1a6e3b5b55fd87bad040 SHA-1: 93326d69fa18371a3725554e86bbfc28f2ce5ffe SHA-256: 72c0bde0bd03955fbef533ac12c4d645d6f006aa27ce18d057e8f61065f96a8b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://drafthe.ru/uplcv?utm_term=free+animal+worksheets+for+kindergarten PDF link annotation
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e7795fdf84a---116622910.pdfIn PDF document text
- https://uat-tunisia.com/userfiles/file/wesijesofofa.pdfIn PDF document text
- http://aftckwt.com/uploads/file/63250085972.pdfIn PDF document text
- https://canevastoilestjean.com/upload/editor/file/fupalolas.pdfIn PDF document text
- https://fnb-concepts.com/images/uploads/files/21771536453.pdfIn PDF document text
- http://alkanboya.com/files/file///90771082949.pdfIn PDF document text
- https://progin.ch/ckfinder/userfiles/files/51038187325.pdfIn PDF document text
- http://pileshoppen.dk/userfiles/file/giritusikapekinedefew.pdfIn PDF document text
- https://protrialse.eu/files/files/24136547164.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094528b97a11---19659121749.pdfIn PDF document text
- http://flgr.ru/files/files/ligaborikizusan.pdfIn PDF document text
- http://daivupaint.com/img-chamthi/files/23394665804.pdfIn PDF document text
- http://acecaalcoy.com/userfiles/file/dajafowabipaxe.pdfIn PDF document text
- https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085618b4792e---feruwunowojagatelupume.pdfIn PDF document text
- http://drentmedischadvies.nl/uploads/files/96364225128.pdfIn PDF document text
- https://marjoyunlar.com/calisma2/files/uploads/57336924708.pdfIn PDF document text
- https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874d491d235---79501459739.pdfIn PDF document text
- http://bigcool.net/webroot/img/files/pumumodo.pdfIn PDF document text
- http://abwvictory.com/uploads/files/momurutibapaxisanunadas.pdfIn PDF document text
- https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/504fde0722f2afdd6c879c5e919dabcf/28681259449.pdfIn PDF document text
- https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160acad5364006---kujutilu.pdfIn PDF document text
- http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b08ee34ac---rumipax.pdfIn PDF document text
- http://sobinco.cz/ckfinder/userfiles/files/jivusaxenilujodasatulozij.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb51ae41cc---47996712960.pdfIn PDF document text
- https://okazdedziecko.pl/_files/Media/file/3598528678.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_off0000f29f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF29F	10956 bytes
SHA-256: `4a8dc5360bc02918cd04d8d4c40e320a769d360130722fceb45e4e5230e71665`
`font_01_sfnt_off00010ba5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BA5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000123b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123B7	17100 bytes
SHA-256: `eb8ba8afe9ba2ad02a17a66268c14698c1e15258a900008b375b4ef6f94239d5`

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