PDF malware analysis — malicious · 9feb9e372f5bd406

MALICIOUS

PDF

81.6 KB Created: 2021-09-21 10:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 7f734da1cfcfad53a9429d5bbcf8523c SHA-1: 70922dbb2a0958b5940d9c626275a5b90bed9850 SHA-256: 9feb9e372f5bd4067dd358cd0529c7df54036886a512ba92b7ca9701b762f804

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document's primary purpose is to host a large number of links on disposable domains, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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://archism.ru/uplcv?utm_term=justice+league+unlimited+season+3+watch+online PDF link annotation
- http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/161332903f2e72---kiruzasevosife.pdfIn PDF document text
- http://abbeytraining.net/userfiles/file/purivakopagivugik.pdfIn PDF document text
- http://thaoduoconline.com/userfiles/image/file/jagakidig.pdfIn PDF document text
- http://www.saito-ken.jp/userdata/file/savemakis.pdfIn PDF document text
- http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16142c44382157---purujutibakoxelolav.pdfIn PDF document text
- http://elateridae.com/images/FCKeditor/file/xewepojizali.pdfIn PDF document text
- http://huucodatlanh.com/userfiles/file/levarogubapupuvamezim.pdfIn PDF document text
- https://greenfins-thailand.org/uploads/file/kisapevenorajev.pdfIn PDF document text
- http://luisacortesearchitetto.it/userfiles/files/51042880293.pdfIn PDF document text
- https://fond.ru/userfiles/file/69961834793.pdfIn PDF document text
- https://taptigrihnirman.com/singhania/downloads/file/7756269168.pdfIn PDF document text
- http://greenglobepms.com/uploads/92704674244.pdfIn PDF document text
- http://www.farmaciapenil.es/userfiles/files/14792497736.pdfIn PDF document text
- http://zaiger.ru/img/file/2956650499.pdfIn PDF document text
- http://w3-japan.com/js/upload/files/73534617257.pdfIn PDF document text
- http://rulife.ru/ckfinder/userfiles/files/jazatubafesijuzuvulavu.pdfIn PDF document text
- http://ijfbn.com/editor_up/korika.pdfIn PDF document text
- http://quangcaosms.org/media/ftp/file/52806164804.pdfIn PDF document text
- http://everestlodgelukla.com/userfiles/file/47651259095.pdfIn PDF document text
- https://zoomkish.com/basefile/zoomkishcom/files/lekikunawumigutowalivi.pdfIn PDF document text
- http://mim2010.ru/userfiles/file/leronidalakilejaditadojup.pdfIn PDF document text
- https://harshahometutors.com/uniformkontakt/userfiles/image/files/puzef.pdfIn PDF document text
- https://emenu.hu/editor_up/82390836207.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_off0000da02.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA02	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f219.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF219	11064 bytes
SHA-256: `77198fb40045c11ee32b1a6ea9f74241f65171891d84f0baf5fed07d552ea70f`
`font_02_sfnt_off00010b9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B9D	17080 bytes
SHA-256: `3e1ab9d0845d06954208f03e29e5465d34e4d1f559b2e65dc18ea23b8090c99f`

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