PDF malware analysis — malicious · 2e97b78849241205

MALICIOUS

PDF

86.2 KB Created: 2021-07-05 21:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: d2b207cc68c35b5628804c68b229bd35 SHA-1: c063a3cfec8ecf4945606a230bab592627369909 SHA-256: 2e97b78849241205e3e0866893218f1a8aaf38f25559198db9ab2e3c09da4ff6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these link farms and the overall structure strongly indicate a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9952

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://cructi.ru/uplcv?utm_term=the+meaning+of+possess PDF link annotation
- https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/d13af6eb5c61c03284537e0a28f1328d/tovesonagugibije.pdfIn PDF document text
- http://asbufestival.com/uploads/FCK_files/file/lapebobakezedi.pdfIn PDF document text
- https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/445eadf0efcc53417505cd7e49b9d6fc/1242726505.pdfIn PDF document text
- http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160766f48eafbf---vitox.pdfIn PDF document text
- http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/10f3b7db1f46f05a959be6cdf63cb469/50420722012.pdfIn PDF document text
- https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16080e871c3414---98313064150.pdfIn PDF document text
- https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc9691eadf---muwoxesasanojozixul.pdfIn PDF document text
- http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdd7457adb---navufowetesadoginagilazu.pdfIn PDF document text
- http://thepokewave.com/uploads/files/lopikan.pdfIn PDF document text
- http://mazdooradda.com/userfiles/file/1708472521.pdfIn PDF document text
- https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/b8955cad7302ec09eae67d9697022209/mizobeveduzelexuvuwefize.pdfIn PDF document text
- http://paitoonbox.com/userfiles/files/fifirazasonasijosil.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5787a92898615c67a0f158ce777d7633/29318782089.pdfIn PDF document text
- https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/b90dfe7d23f8cf28df9e33e9068df3bb/96859169066.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ee2475dde---bupokigalomovaf.pdfIn PDF document text
- http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c4a002b2e---67031736898.pdfIn PDF document text
- http://webcertain.net/contentupload/fckeditorUploads/organization_/file/radidajogajiruzowobel.pdfIn PDF document text
- http://insidethedigitaltrend.biz/userfiles/file/raseripinolasosujugi.pdfIn PDF document text
- https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/kstpaqji33p780bfb975m88vgq/6323710307.pdfIn PDF document text
- http://perfekttorun.pl/pliki/xasopodevofu.pdfIn PDF document text
- http://energo-winstal.pl/userfiles/file/78959360973.pdfIn PDF document text
- https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/70cc0831ef5982333fdf662bdbbad232/juwebidil.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dadcfb4560c---45095519851.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_off0000ecc2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECC2	17776 bytes
SHA-256: `6d9334150c567603c2a127bccac823ed95f17b94f41c02e4078472cb820385ff`
`font_01_sfnt_off00011bb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BB8	10524 bytes
SHA-256: `25e6277412e909c973959b00f0a3d36fb8a2f93f711e5fe5996c5aa20cb2aa17`
`font_02_sfnt_off00013377.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13377	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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