PDF malware analysis — malicious · 5400e007f46f7384

MALICIOUS

PDF

78.7 KB Created: 2021-09-02 12:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 72aa564c716e781f187570a251ddbb01 SHA-1: f40bee79924127d24c459bd4019fa1bc4ea8d5b8 SHA-256: 5400e007f46f7384a1b97925598dd577df9b19dfc3acf251049a811587cdc683

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

Heuristics 6

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.
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://coretry.ru/uplcv?utm_term=manhattan+transfer+book+pdf PDF link annotation
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c57b731a9d3---20482903070.pdfIn PDF document text
- https://lemanssrl.it/file/92634571646.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/95c9640f709df0e00c12a6fd9fb336ec/mixivokuki.pdfIn PDF document text
- http://phunggia.biz/userfiles/file/tubefuluwej.pdfIn PDF document text
- http://mateuszkucharski.pl/admin/file/navutepawonafodobilurilud.pdfIn PDF document text
- http://solarwindependence.com/ckfinder/userfiles/files/35243073638.pdfIn PDF document text
- http://ukicda.com/admin/fckeditor_upfiles/file/2021061921240780554.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff63f6bda6---guliwifemibujamulumazam.pdfIn PDF document text
- http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5660c9034---jilubiwus.pdfIn PDF document text
- http://gemculture.com/userfiles/file/kevudilavev.pdfIn PDF document text
- https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/9aa9b50e30aa38feb0abe18556325e24/winabeni.pdfIn PDF document text
- https://everestart.com/images/stories/file/94993859650.pdfIn PDF document text
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a45db0816c3---zusivaduwuxupegad.pdfIn PDF document text
- https://verredistri.fr/xmedia/file/59726341061.pdfIn PDF document text
- http://hbleg.com/admin/userfiles/files/beguxirujunugasulafuju.pdfIn PDF document text
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/gmt5q9qeghsqmm688n9ma63jr2/jinusalerapuzezufuk.pdfIn PDF document text
- http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/3835152ae492f99b2a248f5f6d68bcee/rujibu.pdfIn PDF document text
- https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/57pfku4d9je64chrrkro8aeith/14122111025.pdfIn PDF document text
- http://ellenia3.eu/userfiles/files/nijotixemaxofilovaso.pdfIn PDF document text
- https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/7fdb17d5c4108de002483db2f24b8936/5932232481.pdfIn PDF document text
- http://mobydick-band.de/fckdata/file/bugare.pdfIn PDF document text
- http://best-infosystems.com/userfiles/file/53348526649.pdfIn PDF document text
- https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/af0817713f877d3db86f459ffac75961/wonezopexu.pdfIn PDF document text
- http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108293f0956a---vawiwubodavevezoxunigevon.pdfIn PDF document text
- http://microcement.ua/userfiles/file/gelemabafabikolege.pdfIn PDF document text
- https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606d583316879---misike.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_off0000cf2d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF2D	10684 bytes
SHA-256: `2bf3162aa1c42483821c73954c1a3ec8bcd82bf4502df8445a05d8379260f08c`
`font_01_sfnt_off0000e760.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE760	17724 bytes
SHA-256: `e33b48712c736b1aa5e593dcc6374fb6f1987cd78a3073c6cb23aef6060f3cac`
`font_02_sfnt_off00011524.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11524	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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