PDF malware analysis — malicious · 22b6d93f12df3ee9

MALICIOUS

PDF

86.9 KB Created: 2021-06-27 04:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01

MD5: ea0fcd8fbd04df41f25e8350608e8eb2 SHA-1: 8d8d37b7fa4adefbbd8d616ac2ff06ee77963b63 SHA-256: 22b6d93f12df3ee9f9b6494aef0d095b20fed58ccbb80f220f8200b69f2a3866

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/84449fefc22008c0c6ec1ffad8956ceb/9823063108.pdf In PDF document text
- http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1606d587ab8adb---defitimofuvinol.pdfIn PDF document text
- https://alula.com/wp-content/plugins/super-forms/uploads/php/files/10149fd8d5c80287b26847a0479da1bf/23113967075.pdfIn PDF document text
- https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/1cc9e2617cde620ca14a30994d348cf0/49691730761.pdfIn PDF document text
- https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/883032eab36521f872cc06f2a2a65614/metutovitixojozivan.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ebae0af1f8a2c9c2f37f5aef8c6d74db/fiwikapoba.pdfIn PDF document text
- https://footballsod.com/images/ck-uploads/files/sulotolizejalodoz.pdfIn PDF document text
- http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160b81bf28889a---31919736362.pdfIn PDF document text
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607475d87c12a---85703899791.pdfIn PDF document text
- http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c066f2cb4e---xareda.pdfIn PDF document text
- http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/35187876291.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/fodositovekoruviguxutebod.pdfIn PDF document text
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16093523691acb---sadazevufozin.pdfIn PDF document text
- http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/74628259038.pdfIn PDF document text
- http://foto-preiss.at/upload_files/files/31468352062.pdfIn PDF document text
- http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/kibtp418a75u833v332j7n2qt4/4565588718.pdfIn PDF document text
- http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/bebcd49461c67ed994976fd2c7bfc797/dedugutenusegizodan.pdfIn PDF document text
- https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/qcpu94gvlnel3sui4amfl6q8pe/92858610613.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62011ebf49---matazelulux.pdfIn PDF document text
- http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/d3f276784b33ce1d742606ab7d6313d3/9363074535.pdfIn PDF document text
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607593d8df603---levazevose.pdfIn PDF document text
- http://caphegiabao.com/upload/fck/file/13780531921.pdfIn PDF document text
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609daec474c12---jixaxalamobap.pdfIn PDF document text
- https://stallion-international.com/userfiles/file/34249427762.pdfIn PDF document text
- http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/foxutuji.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=nta+official+answer+key+neet+2019PDF 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_off0000ec42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC42	18060 bytes
SHA-256: `a504b592ed00841dc64a0d0d20269c518c060cf39e829382bc765a7a702de88f`
`font_01_sfnt_off00011c11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C11	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013428.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13428	11060 bytes
SHA-256: `d2b4157a391b9f5e68f53e8a85000ab269d60596df1526c7e320b288d61bf9cb`

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