Malicious PDF — malware analysis report

Static analysis result for SHA-256 45fceb8efe3cf846…

MALICIOUS

PDF

78.4 KB Created: 2021-03-18 22:27:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f0e6cb423cd64393ac993fab7b9c9f0 SHA-1: 77a762a987b18bfa6aed2be8ebf3680c03590e52 SHA-256: 45fceb8efe3cf8467ac89568c81cdc5950811146964aee4b76bc409f128525ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing or trojan activity. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/123?utm_term=hockey+game+stats+sheet
    • https://cdn.sqhk.co/zoribakim/ib4WjUY/jikagokivokupukesisa.pdf
    • https://cdn.sqhk.co/kalijada/eghjbhi/vowugewitaxas.pdf
    • https://cdn-cms.f-static.net/uploads/4418987/normal_5fdb8415ece46.pdf
    • https://cdn.sqhk.co/vefapatape/LmojaBt/wigafe.pdf
    • https://cdn-cms.f-static.net/uploads/4462730/normal_5fd3407cd90cd.pdf
    • https://cdn.sqhk.co/vifutetax/yChjONI/emotional_intelligence_2._0_summary.pdf
    • https://cdn-cms.f-static.net/uploads/4374532/normal_603c0cea6e543.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/29613df8-c682-479b-9fdb-0a73dc1554aa/used_car_buying_checklist_team_bhp.pdf
    • http://bepibuxel.epizy.com/grade_2_phonics_test.pdf
    • http://tiwadelir.rf.gd/chief_finance_officer_job_description.pdf
    • http://foxoxamaxanibi.epizy.com/game_loop_tencent_apk.pdf
    • https://uploads.strikinglycdn.com/files/3e0dbaff-0884-46bb-81a3-b89ccc5c0e95/panasonic_phones_user_manuals.pdf
    • https://uploads.strikinglycdn.com/files/1808e94b-63f2-49d6-9dfd-8c516dac4e89/99782227603.pdf
    • https://uploads.strikinglycdn.com/files/afb32414-64cf-4a9f-af3c-594db1fe2a56/mcgraw_hill_connect_student_registration.pdf
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_112b3f7bbd254832852d7208d4e43e7b.pdf?index=true
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_903ea8cce1b44e198ae24db7e23a7bdc.pdf?index=true
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_2d4e76aee08f42f78b8dfd2acf0919f9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2bf16d7e-8d33-43cb-b737-9520523cdc82/90882238925.pdf
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_51c5850601e7407899ba1c175f685d87.pdf?index=true
    • https://uploads.strikinglycdn.com/files/010ef208-5a34-4a7d-9ddc-6ac96e2cf01b/handgun_training.pdf
    • https://uploads.strikinglycdn.com/files/aa1a05dd-5fdb-40a2-9b1a-e20259c2fc97/67619537571.pdf
    • https://uploads.strikinglycdn.com/files/a592f23a-d8cc-4ff6-b35a-da0f606fdfaa/how_to_use_adobe_draw_on_ipad.pdf
    • https://uploads.strikinglycdn.com/files/178a8e32-8c9b-4c39-a589-be89cad5994d/safety_razor_blades_amazon.pdf
    • https://uploads.strikinglycdn.com/files/8743ebb3-a4bc-42e3-aacc-da63bf128614/75759805314.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b9.bin
7a1bdc84e1994243a62f775eef6d490882038de68e4a72c34007713e5c1f614a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 5212 bytes
font_01_sfnt_off00010663.bin
34bf54cf6db5d455406ff1ce540dd08c4434785bf9236da22c74760f6ccadcf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10663 11240 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.