PDF malware analysis — malicious · 3b09ddf96172cbc1

MALICIOUS

PDF

86.4 KB Created: 2021-07-17 15:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 24080c424952d84cbff8046da06bde3e SHA-1: 2d5a85b8f7d3607e5c63dd15fb695f81ec8e25bc SHA-256: 3b09ddf96172cbc1bc5a9fb232230f08f753183192a0d4b22f9d73d3e2873ee7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting domains. These links likely serve as a lure to download further malicious payloads or engage in phishing activities.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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 http://doo-san.com/userfiles/file/20210627114813.pdf In PDF document text
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9edb32196b---93469546104.pdfIn PDF document text
- http://asesorgubernamental.com/images/file/47703155665.pdfIn PDF document text
- https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/cf1fe5cb24c10c1bb7bcb0d7bb79adc1/44926869222.pdfIn PDF document text
- https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cca7b09a770---35911849980.pdfIn PDF document text
- http://voxel-avocats.fr/uploads/file/47281069277.pdfIn PDF document text
- https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/penuzaxi.pdfIn PDF document text
- http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607a46a35fc37---tewesowusawagupakereme.pdfIn PDF document text
- http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160758877b4aa9---lixukaweb.pdfIn PDF document text
- http://atomleasing.ru/media/File/22674925274.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9841ff3f72---4308453160.pdfIn PDF document text
- https://2ruoteexpo.it/ckfinder/userfiles/files/bunezumofarajeti.pdfIn PDF document text
- http://ricarda-allegra.de/userfiles/file/xibidopa.pdfIn PDF document text
- https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/1b9d33083523096820f81e25e673d3d7/saduzuwafabikok.pdfIn PDF document text
- https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/4c27cf8f139bf92f2ebb116099146687/wovetozevuxovidid.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077d4f7b3251---bovufuzokegux.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/d0df128e02dc78a75d4c616353106a68/86374778154.pdfIn PDF document text
- https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a6fe07f1d---66031489783.pdfIn PDF document text
- http://classicalgardenfountains.com/uplds/file/82697887080.pdfIn PDF document text
- http://autoset66.ru/admin/ckfinder/userfiles/files/14964405438.pdfIn PDF document text
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160bba29c1c48f---zisozoxem.pdfIn PDF document text
- http://progfin.pl/userfiles/file/zawiwowovonuwiz.pdfIn PDF document text
- https://nestsearch.in/admin/uploads/file/likozunovoruzut.pdfIn PDF document text
- https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16084049718161---88256194559.pdfIn PDF document text
- http://bright-mineral.com/uploadfile/file/2021070806161087.pdfIn PDF document text
- https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/e1adadbccd35d3a3c5fc4b84cef68504/87429672114.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=fall+guys+pc+free+download+full+versionPDF 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_off0000ebd5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBD5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000103e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103E7	17196 bytes
SHA-256: `7e86fd30797b4e4d633bb8a9515fa6d23790f7ccd46712247ee96109c34e296b`
`font_02_sfnt_off000130c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130C0	11040 bytes
SHA-256: `a3a7c26fc82cfeec3e63b804bb440878c50e2734c17b827dc215b788cae6cd01`

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