PDF malware analysis — malicious · f0979dd764bf0846

MALICIOUS

PDF

86.1 KB Created: 2021-07-01 21:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: ca76e8851afc46062427e3f6ea026438 SHA-1: 429c8f6571c585b19015e8155179f6ff6bc90308 SHA-256: f0979dd764bf084605aa51703677deec9cdb0e85d591da3b99feb064c13f6e3f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for malicious purposes. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload is being distributed via these links. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9972

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://garglob.ru/uplcv?utm_term=structural+bolting+handbook+2010 PDF link annotation
- http://laboratoriologos.it/userfiles/files/8528413588.pdfIn PDF document text
- https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/jqkf07450qgv0ovg0ifo3ubck1/xozudagodibamawufa.pdfIn PDF document text
- https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/01v15h1fd5mnugpfcs3okam0el/giporo.pdfIn PDF document text
- http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160704e6d65885---88715681711.pdfIn PDF document text
- http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/69b5a8c2b5957266ed8769d8ea35e694/koxet.pdfIn PDF document text
- https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbb23ecd50---4005129472.pdfIn PDF document text
- http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16080f40024f23---35048953806.pdfIn PDF document text
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddbe8656de7---66965058867.pdfIn PDF document text
- https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d7d112ab0---jagufifose.pdfIn PDF document text
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/aa27494f11b4408467cfd522ed5fbaca/gibanimijud.pdfIn PDF document text
- http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985337d56ea---8640627526.pdfIn PDF document text
- https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/939abec8f7543aab09f10fa4c1eb7e9e/10219408115.pdfIn PDF document text
- https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/9801a7fb9f3cb1bc56bb0f1615b26d85/kexajamaxewiwiw.pdfIn PDF document text
- http://laulumaja.fi/ckfinder/userfiles/files/fisiwezurupemifimo.pdfIn PDF document text
- https://rcot.org/userfiles/file/nuloxi.pdfIn PDF document text
- https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/5433e94cdeaf0044bfb2ebd41300d0cb/jarutadigugakod.pdfIn PDF document text
- https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/8g2q3rcatgq0nq816qs5ijrvlp/bazelezilode.pdfIn PDF document text
- https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/7mv353c621off8ntiimnloh831/vimanonuninunurazubobanop.pdfIn PDF document text
- http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fcc649b7c---pezugivatop.pdfIn PDF document text
- https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/lqgl380j3oqpgikkcnjl5stc01/ripamugimibuj.pdfIn PDF document text
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607964dfe2dcf---80008874938.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_off0000eb08.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB08	11052 bytes
SHA-256: `62533aec665368d22d2b3237f48c35116b55d05f5f8b8cd8148e51b9b8f6db20`
`font_01_sfnt_off0001047c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1047C	17912 bytes
SHA-256: `9916448f10cb1167b3477f41d8a80e4db8ba2b9529a1ef6fd5a1a5fec7e6c504`
`font_02_sfnt_off00013393.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13393	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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