PDF malware analysis — malicious · ec9d968e712483fc

MALICIOUS

PDF

81.2 KB Created: 2021-09-04 21:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: f9a2c183103233bca36f742763dfbffd SHA-1: 1833dbafefb42c6f7f16cdd586203b1ce49aec08 SHA-256: ec9d968e712483fc852caf8358febe5c33384c64a5cfe56a6c3ee7571b6558fb

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. It contains numerous external URIs and points to compromised WordPress upload storage, suggesting it functions as a link farm to distribute malicious content or phish users. The PDF structure and embedded URLs are consistent with a phishing or malware delivery campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://huntic.ru/uplcv?utm_term=command+prompt+book+pdf PDF link annotation
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd9e2098c3---2220455043.pdfIn PDF document text
- https://htapigroup3.com/contents/files/riposedivuwodom.pdfIn PDF document text
- https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/d5f44b82ae3e87d413fac78f8fd175b1/rinuramogukaf.pdfIn PDF document text
- https://sealskinz.ru/files/file/93477654135.pdfIn PDF document text
- http://nineslash.com/user_file/file/vinik.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef3807e8dc---21471744561.pdfIn PDF document text
- http://magicdiscoradio.hu/userfiles/file/32594715811.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d75fa09217a---4299589380.pdfIn PDF document text
- https://soechi.com/userfiles/file/56988475242.pdfIn PDF document text
- http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/aie7232afmqlh96cmc7dr7p6n7/97914615523.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcaf2ac590---48623269498.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607262881ba5c---28244653051.pdfIn PDF document text
- http://aliotoconsulting.com/clients/862286/File/82472123333.pdfIn PDF document text
- http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b1e803d20---zegosewitofefawix.pdfIn PDF document text
- http://bualuang101.com/backoffice/upload/files/34960525064.pdfIn PDF document text
- https://mimpiindah2.com/contents//files/88087230529.pdfIn PDF document text
- https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aed28af116---vizuriton.pdfIn PDF document text
- https://bahispesinde.com/gnc/veri/_files/vobiz.pdfIn PDF document text
- https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/8ddb7fa5aeecdd2bc00b8564e7427838/24392451496.pdfIn PDF document text
- http://chinhsuasolieu.com/media/files/49530752532.pdfIn PDF document text
- https://ijmscr.com/ckfinder/userfiles/files/solab.pdfIn PDF document text
- http://imailbox.nl/images/uploadedimages/file/4931100270.pdfIn PDF document text
- https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/vg7r74bakrfmq92oe6kq8ks7l4/litudorerifazanif.pdfIn PDF document text
- https://extremedriveline.com/ckfinder/userfiles/files/44461208137.pdfIn PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5420d186621bf3240aba6eba77b2c950/72020164352.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607391cd07a3e---35518111615.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_off0000db0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB0B	10484 bytes
SHA-256: `fa404b355c23769bec4a060f901026ea5ddb6211170e00fa19e8a74740575ba4`
`font_01_sfnt_off0000f29e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF29E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010ab0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AB0	17416 bytes
SHA-256: `6940c8453507b1cbf1356100820b7e908f81c9f2cbe52689b24ee3d64081722f`

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