PDF malware analysis — malicious · e4c0d605493f5148

MALICIOUS

PDF

74.8 KB Created: 2021-08-28 06:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 5cba14e3c08c8691fe1fa6aa1c1f0764 SHA-1: c268a4f442a3bc7d6430e5ecc24887988d228989 SHA-256: e4c0d605493f5148894be03e773e8c6e1c3ecbddd6979d4fabbfc565828dc440

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were extracted, the structure and URL patterns are consistent with a phishing lure or a downloader.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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://museos.comarcadelasierradealbarracin.es/ckfinder/userfiles/files/rurixuzafedetumosaregomu.pdf In PDF document text
- http://goldenpoolandsauna.com/user_img/files/gaburorizugitupajiguta.pdfIn PDF document text
- http://daindnc.com/fckeditor/userfiles/file/27772827072.pdfIn PDF document text
- https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/50b0aaed5c7be644050bae4a6b92030b/41463278505.pdfIn PDF document text
- http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/75645925659.pdfIn PDF document text
- https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/1a9lchmnk29co462jo4kck7h66/vakogetok.pdfIn PDF document text
- https://ekransamara.ru/files/15363047771.pdfIn PDF document text
- https://reazfarah.com/ckfinder/userfiles/files/fezewowazomidelakoke.pdfIn PDF document text
- https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160708a7646077---wuzoxak.pdfIn PDF document text
- https://www.koreayokogawa.com/ckfinder/userfiles/files/57059389937.pdfIn PDF document text
- https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/f538a722272fcf4475cc5742ef2857b9/gorazoz.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/161131d3308bcc---17545277706.pdfIn PDF document text
- http://watthaistuttgart.de/userfiles/file/2227396510.pdfIn PDF document text
- https://aedwea.com/upload/foto/46729720110.pdfIn PDF document text
- http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44bcd8a9b---fuxezasusokaz.pdfIn PDF document text
- https://tecnibat.net/uploads/archivos/puvagutikoputuje.pdfIn PDF document text
- http://alliance-ltd.com/userfiles/zulugizekavunekin.pdfIn PDF document text
- http://dwornawodzie.pl/userfiles/file/1373320712.pdfIn PDF document text
- http://zzquansu.cn/d/files/kozat.pdfIn PDF document text
- http://granite1962.com/clients/869125/File/9821956831.pdfIn PDF document text
- http://195exim.com/datas/files/fezupibadiduwulatumem.pdfIn PDF document text
- https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/kejimujaxe.pdfIn PDF document text
- http://tyko.pl/userfiles/file/duvalagifoxevak.pdfIn PDF document text
- https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ee30213ad28---vupitaxago.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=belly+breathing+babyPDF 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_off0000c4f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC4F4	15904 bytes
SHA-256: `ce12db4abc69e8efadd5a3dbb9ea2d23c88547017fcda4298ef892208d15c80e`
`font_01_sfnt_off0000ed8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED8F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000105a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105A6	10408 bytes
SHA-256: `23a21aa2c856bc301b7ac63a0697c5377d7c04513bf79d7ceeaf1bf65b33490b`

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