PDF malware analysis — malicious · ed801f579737e93b

MALICIOUS

PDF

83.2 KB Created: 2021-03-05 10:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13

MD5: b4b1e97406c321c0ae20c192bf3bb44b SHA-1: 5b5a5dad3e11515e5f26c0f6dce4759c80bdbed6 SHA-256: ed801f579737e93b20e3b28419d4db7066067edb4d3d91d55ec7e0c4d4092519

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to disposable hosting, and is identified as a link farm. The presence of external URIs and the overall structure strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

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.
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://nipisod.ru/strik?utm_term=can+i+learn+muay+thai+at+home PDF link annotation
- https://cdn.sqhk.co/melipetoluf/exN4hfE/candy_legend_game_for_pc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4378845/normal_5fca4d507eab3.pdfIn PDF document text
- http://draiwenstore.online/2017_chevy_colorado_diesel_performance6jm9u.pdfIn PDF document text
- http://jakartapro.xyz/wikevujurulrpyc4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424647/normal_603408e684272.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4423429/normal_601e1eea5220a.pdfIn PDF document text
- https://cdn.sqhk.co/sevafeluba/Thf83jf/collage_maker_online_free.pdfIn PDF document text
- https://cdn.sqhk.co/porosobof/Ofibi8w/49973359041.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448539/normal_601b7828a7f53.pdfIn PDF document text
- https://cdn.sqhk.co/remozemot/gAu58gf/most_wanted_free_download_android.pdfIn PDF document text
- https://cdn.sqhk.co/liminekaj/hVsYCgf/toxaxakefa.pdfIn PDF document text
- http://lngcliente.com/sororududonimasiruw52.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4403819/normal_5fcd433688665.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/58626047-ae36-4e77-9bda-6a730768de64/84033595254.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6d21d5d7-5b90-4cfd-977c-98b56332459a/bose_cinemate_520_universal_remote_codes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eb758299-6b4d-46d7-a5e5-b859a6a3ff9d/the_bone_collector_trailer_2019.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/71bb33ad-d6d8-41d8-bd9c-8ae99e0982fb/windows_10_pro_free_download_full_version_2019.pdfIn PDF document text
- https://s3.amazonaws.com/nuxomigo/dfm_foods_annual_report_2017.pdfIn PDF document text
- https://s3.amazonaws.com/gajakelegeza/belkin_n600_db_setup_guide.pdfIn PDF document text
- https://s3.amazonaws.com/wotodedaruzuk/any_video_converter_software_free_pc.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/41488869-eda7-461b-a89e-58183f39e4a4/elkay_model_ezs8l_installation_manual.pdfIn PDF document text
- https://s3.amazonaws.com/divexikav/imax_b6ac_v2_manuale_italiano.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fe5a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE5A	4752 bytes
SHA-256: `1514a7dc2ada6a8a37f4058d8c8c7664732d16821efc5951eb65cc5443508e84`
`font_01_sfnt_off00010e57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E57	10224 bytes
SHA-256: `133da30e0c0f737c90e0717c81f8589950e330327602992ec5dbceeeb6621b37`
`font_02_sfnt_off00013164.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13164	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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