PDF malware analysis — malicious · 129d6a4455f1e96e

MALICIOUS

PDF

85.2 KB Created: 2021-09-16 21:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 0b512e7922bff96267533a761c7a68c3 SHA-1: bb54f904bc69baeb09ef623f8eee7202ed081c95 SHA-256: 129d6a4455f1e96e29ea65065c89b86e0c78e9514bc040b3891ad6f288a3942b

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to host a large number of links, likely for phishing or distributing further malware. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://medvor.ru/uplcv?utm_term=is+carrot+a+man+made+vegetable PDF link annotation
- http://myphamasia.net/upload/files/benogivaveriper.pdfIn PDF document text
- https://bloomland.com/sites/bloomland.com/files/jatutirabapijiwimoxak.pdfIn PDF document text
- http://vektor-bezpeki.com/userfiles/files/6751009755.pdfIn PDF document text
- http://budka39.ru/files/42024112747.pdfIn PDF document text
- http://vitalchurchesinstitute.com/files/file/baxazuvanozozirum.pdfIn PDF document text
- http://amandatour.ru/js/ckfinder/userfiles/files/gosido.pdfIn PDF document text
- https://aathichudi.org/userfiles/file/1148877171.pdfIn PDF document text
- https://www.gurgy.net/ckfinder/userfiles/files/63877801990.pdfIn PDF document text
- http://smartraoptics.com/fck_filemanager_upload/file/suwogetejorugugupo.pdfIn PDF document text
- http://train-in-japan.com/images/blog/file/lesupebiberujigof.pdfIn PDF document text
- https://medosojewellery.com/userfiles/files/23213136761.pdfIn PDF document text
- https://lrsinc.co/userfiles/file/wemigamuzo.pdfIn PDF document text
- http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/sorigofod.pdfIn PDF document text
- https://osiindia.org/ckfinder/userfiles/files/28165288849.pdfIn PDF document text
- http://hamdannepal.com/userfiles/file/95835296883.pdfIn PDF document text
- http://chongthamphucthang.com/images/news/files/46309407125.pdfIn PDF document text
- http://gfk-schwimmbad.de/i/File/xowitujanezezowunexava.pdfIn PDF document text
- http://hzkontejnery.cz/ckfinder/userfiles/files/66178880060.pdfIn PDF document text
- http://c2ctrading.org/cms_upload/files/xivujiwiwewifula.pdfIn PDF document text
- http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161429bafe5516---nolawe.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/6en4ct0nnboir5d7dh3qkupmkr/41466873812.pdfIn PDF document text
- https://www.agcontraincendios.es/ckfinder/userfiles/files/45406647548.pdfIn PDF document text
- http://logicamail.it/draft/media/44032119440.pdfIn PDF document text
- http://iwilldoit.ru/uploads/files/files/kibebixaguji.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_off0000e6c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6C1	18200 bytes
SHA-256: `93130b2b05c7695a142307db9f1c428549363d609397dc654533ab5e8a533026`
`font_01_sfnt_off00011607.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11607	10776 bytes
SHA-256: `8a12f0b3026ab16adb3a9ae6d73449763272b833f3688783e073cd0c787c3288`
`font_02_sfnt_off00012eb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EB1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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