PDF malware analysis — malicious · 79c259f461a09b2f

MALICIOUS

PDF

74.7 KB Created: 2021-09-19 20:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: c2ac5f17cd236346cd5c76ce8b9514d7 SHA-1: 8a6027e735ad5f73603ade6d0c7b8144e9c19ef2 SHA-256: 79c259f461a09b2f6e7beb444ad2f505be7f9e847005c59f9c27893aae216d64

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing unwanted software. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be instructing the user to open a password-protected archive, a method to bypass gateway security.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://laborke.ru/uplcv?utm_term=prince+of+persia+warrior+within+download+for+pc PDF link annotation
- http://mjacz.cz/soubory/files/42087683368.pdfIn PDF document text
- https://congchunghadong.com/uploads/files/16731874329.pdfIn PDF document text
- http://fernandopelosini.it/userfiles/files/48500956648.pdfIn PDF document text
- https://tallerescarrion.com/uploads/file/43332621506.pdfIn PDF document text
- http://avrig35.ro/uploads/fck_editor/file/81884447170.pdfIn PDF document text
- http://skazka76.ru/pic/userfile/rasoma.pdfIn PDF document text
- https://chaletsuenodesol.de/files/39272010570.pdfIn PDF document text
- https://phuketwebstudio.com/ckfinder/userfiles/files/36209719737.pdfIn PDF document text
- http://eros-arena.de/eros/userfiles/file/44106423737.pdfIn PDF document text
- https://lbk-ingatlan.hu/uploads/file/3375463144.pdfIn PDF document text
- https://podiummagazinenews.com/ckfinder/userfiles/files/45555523855.pdfIn PDF document text
- http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16146f33c00447---56765041000.pdfIn PDF document text
- http://www.verneteco.com/ckfinder/userfiles/files/jekijetuzuxukuralepaf.pdfIn PDF document text
- https://recapress.com/ckfinder/userfiles/files/gixukerubuf.pdfIn PDF document text
- http://lagrupacio.cat/file/jafupaxulelukewerotita.pdfIn PDF document text
- https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/669b8ee6a6add7f780793ac7f4d1e4f1/24231344887.pdfIn PDF document text
- http://laureysnv.be/uploads/files/60320025060.pdfIn PDF document text
- https://careerroots.net/ckfinder/userfiles/files/93898918935.pdfIn PDF document text
- http://craj-ops.craj.cz/soubory/xezunitisemoxanu.pdfIn PDF document text
- http://taiwan-tsai.com/upload/files/pegujavaxazodikara.pdfIn PDF document text
- http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/92747069446.pdfIn PDF document text
- https://millvalley.com/wysiwygfiles/file/85465495139.pdfIn PDF document text
- http://formel1vermietung.de/userfiles/file/62300737058.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_off0000befa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBEFA	10804 bytes
SHA-256: `160b460a3ba77350195eef0fab1f2eeaaefbee61e915b1d88cf0d994a51136f6`
`font_01_sfnt_off0000d7db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7DB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000efed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFED	17152 bytes
SHA-256: `26ff1880ac6abf1189aee17fd7560890b1179e4f3f65e80b83d075eccc1a8689`

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