PDF malware analysis — malicious · 2e0da8c0a416ea4c

MALICIOUS

PDF

78.9 KB Created: 2021-05-06 06:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 6772117d0b75bcba1dcacf72f457bdbf SHA-1: e191d29cd1f82b34a213ac8b1511994ead3ecdb7 SHA-256: 2e0da8c0a416ea4c16fffd8779afecbdf6bd9a0381ca21998f25388361dbfe13

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the document's apparent purpose of luring users with a download pretext align with spearphishing attachment tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://vilenefex.ru/strik?utm_term=sketchup+house+design+free+download PDF link annotation
- https://cdn.sqhk.co/letarezetap/hbibhgc/87528995614.pdfIn PDF document text
- http://vutajazelige.medianewsonline.com/84791721160.pdfIn PDF document text
- https://cdn.sqhk.co/tasewapimol/jcKzgjX/olvidarse_de_todo.pdfIn PDF document text
- https://cdn.sqhk.co/laxegipo/icigkgc/kick_the_buddy_mod_apk_pc_download.pdfIn PDF document text
- https://cdn.sqhk.co/dokadajij/ieSibcz/69431846926.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://5f384421-c3d0-4b4c-85a6-d3745974446f.filesusr.com/ugd/40006b_da662311b9df44148a9e37b016d23472.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/kubafezin/english_reading_comprehension_worksheets_for_grade_8.pdfIn PDF document text
- https://3b9c8e93-52ab-41e8-96f8-e5fc639bf6fa.filesusr.com/ugd/fe3ccd_87d33161d632420b8121f27807855726.pdf?index=trueIn PDF document text
- https://72be5e1b-4d14-4335-96ee-88463f604c48.filesusr.com/ugd/57ecfe_ca5518ea114d4c2394988430920c708d.pdf?index=trueIn PDF document text
- https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_11f529df0aaf40189b7a74c408c2f80e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xirixepo/beats_studio_wireless_model_b0501_parts.pdfIn PDF document text
- https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_b7ad20ef4529402f81c3d86a1c7e51c3.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/wozowuledij/25968218583.pdfIn PDF document text
- https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_2a00184d83da46058e756b090a896f02.pdf?index=trueIn PDF document text
- http://noxumalog.onlinewebshop.net/algology_textbook.pdfIn PDF document text
- https://2c91b947-1dd8-401e-ae91-d595f2f75867.filesusr.com/ugd/0af078_750b281444f648f38116e37506dacbe6.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/rovuweraja/mathematical_logic_for_computer_science_gate.pdfIn PDF document text
- https://s3.amazonaws.com/baposivarabuj/descargar_software_serato_dj_lite_for_windows_10.pdfIn PDF document text
- https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_1ac8eacfa4e94cfea6f479a08cf147af.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f26e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF26E	5676 bytes
SHA-256: `6b42ee567764abdf6cb12f485ad6db8e680798c5c4175deea8f14ca7f40397b4`
`font_01_sfnt_off000105d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105D2	11948 bytes
SHA-256: `094439a546428914bad39d588b3400ce01554595e4b536d384bad761bb25ae97`

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