PDF malware analysis — malicious · ed237b42c94b5f93

MALICIOUS

PDF

98.5 KB Created: 2021-07-01 17:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: fa46db8d50782de14241cf63701f2b36 SHA-1: 5e94fc6bb1d36ec70757f35d4c8deb543e4198b4 SHA-256: ed237b42c94b5f9368df84d1efc573cbf677b6312233980f79f2cfafcd6a4562

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, directing users to numerous external URLs hosted on compromised WordPress sites and disposable domains. The primary intent appears to be the distribution of malicious content or phishing attempts through these numerous links.

Machine Learning

Nyx PDF Classifier malicious score 0.9800

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://krisoc.ru/uplcv?utm_term=example+of+logos+in+writing PDF link annotation
- https://alianzatours.com/imagenes/file/24189724200.pdfIn PDF document text
- https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/bep1g3c697f32p74e95m1hu183/welodabofabip.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f22c13df1e---6211705898.pdfIn PDF document text
- https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/2b163d490ca568a4d34d1f08eae2a156/regubewijobotakepupe.pdfIn PDF document text
- http://aeronautike.com/userfiles/file/81134845225.pdfIn PDF document text
- http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2173af13d---42467556688.pdfIn PDF document text
- https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/9ec7c484a902a064c80e164271e4059a/76477539768.pdfIn PDF document text
- https://cottonweb.net/userfiles/file/xebezawenepelowopuwebor.pdfIn PDF document text
- https://dcoderesearch.com/uploads/dabodupuduj.pdfIn PDF document text
- https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/644jveb9nnnk2ahmhqonnn0q6q/75041956252.pdfIn PDF document text
- https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/ee4b87e27e0c245ec80944c00660dd2a/60472222944.pdfIn PDF document text
- http://nhhs78.org/clients/63854/File/luberar.pdfIn PDF document text
- https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/uhhg8ch0jpmqhpmp4fpl8uhc2a/72654184390.pdfIn PDF document text
- http://amirafouad.com/uploaded_files/file/3306695951.pdfIn PDF document text
- https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/sawaxeba.pdfIn PDF document text
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608125c66dfea---46838458669.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724611efe4c---47309916602.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/4289c7573a4318ed4e526fbde30bf34e/bedusovo.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8431d2e910---58452208075.pdfIn PDF document text
- https://samtee.com/admin/images/file/976535141.pdfIn PDF document text
- http://donateagift.eu/userfiles/file/fozabisinanoxa.pdfIn PDF document text
- https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607fd233ad45d---44397767374.pdfIn PDF document text
- http://www.pranabkumar.com/fckimages/file/33305024654.pdfIn PDF document text
- https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/566ec85c685fca356b36a223807618f5/73846525339.pdfIn PDF document text
- http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aad5a9777d7---17833319798.pdfIn PDF document text
- https://actor-conseil.com/files/file/zekinepomad.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_off000120a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120A5	10872 bytes
SHA-256: `73bf8ce82d7912e06309da3d98b792cd9e73f5a2c52bcf53d1be0ba7bf1b1c6a`
`font_01_sfnt_off000139d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x139D0	16876 bytes
SHA-256: `10c892e79d52d1c22850c938c87e96d02d5e35efa3e02eb35e42a00e2238da97`
`font_02_sfnt_off00016566.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16566	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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