PDF malware analysis — malicious · 9c3e7428a62ccdc6

MALICIOUS

PDF

112.1 KB Created: 2021-03-28 19:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: edeedb0880215ea7cb208ffd4edafc37 SHA-1: 4f782001cf2e4a6985a928cba57bc95dbb0c1ab8 SHA-256: 9c3e7428a62ccdc6bd67a7e5a7198ca2da8fff6dda028058db337c54308e7f9d

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm designed to redirect users to potentially harmful sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/wix?keyword=jedi+guardian+focus+build+6.0 PDF link annotation
- http://kikebumanexewuj.22web.org/75428439368.pdfIn PDF document text
- https://cdn.sqhk.co/jekunesoru/ujikgjs/85614393307.pdfIn PDF document text
- https://cdn.sqhk.co/jopubelo/gjgCidW/dream_hotel_club_nyc.pdfIn PDF document text
- https://cdn.sqhk.co/zarejesorufo/QOidjgt/kedezuxeteritozazoguvu.pdfIn PDF document text
- http://vefaporuzudu.iblogger.org/manion_wilkins_dispensing_fee_report_2019.pdfIn PDF document text
- http://mobutadaxez.medianewsonline.com/82825299904.pdfIn PDF document text
- https://cdn.sqhk.co/xuxozowaki/bltbXie/37760155224.pdfIn PDF document text
- http://jevafurevozu.mygamesonline.org/larva_aedes_aegypti.pdfIn PDF document text
- https://cdn.sqhk.co/tedalome/d73IhyZ/sepijaxobenejumawizasabid.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/ad168435-be7a-4d53-bd2e-5c2ad75e0c57/bebotizuvu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aac102ce-ba5e-4161-8b13-e5ddcd36992f/download_doubledown_casino_codes.pdfIn PDF document text
- http://legabukev.epizy.com/kavipenodetofagoguzo.pdfIn PDF document text
- https://s3.amazonaws.com/godewumazek/21217864171.pdfIn PDF document text
- https://s3.amazonaws.com/lotibabakuj/curriculum_guide_in_english_grade_1.pdfIn PDF document text
- https://s3.amazonaws.com/resisuna/annamacharya_keerthanalu_free.pdfIn PDF document text
- https://s3.amazonaws.com/kovilowab/echo_pb-250ln_home_depot.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2244b766-5872-4fec-9d4a-923825f3860a/how_much_does_it_cost_to_fix_charging_port_on_laptop.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/436cdd14-c24d-411a-a4a9-4442a4890aa8/bobomekitax.pdfIn PDF document text
- https://s3.amazonaws.com/fazujo/does_nvme_matter_for_gaming.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e829b6b3-963e-4593-9de8-a5ee26581fc4/11383514444.pdfIn PDF document text
- https://s3.amazonaws.com/medaliwifufugel/likeminujuniwane.pdfIn PDF document text
- http://gumuparalimej.rf.gd/penyebab_bronkopneumonia.pdfIn PDF document text
- https://s3.amazonaws.com/faxaxos/tixopuriluzoxajabuzu.pdfIn PDF document text
- https://s3.amazonaws.com/pogolo/html_form_button_value_post.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_off00016c19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16C19	5448 bytes
SHA-256: `1ae32fbbfca6095a6792c81fcbbaa5843bcbcf537204ee49b883b63285c21d19`
`font_01_sfnt_off00017ea2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17EA2	11088 bytes
SHA-256: `f1cecab5e88f2525d989c1b7fbeaeb3dd0440065b18ef301fb32f6c42907b990`
`font_02_sfnt_off0001a4a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A4A9	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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