Malicious PDF — malware analysis report

Static analysis result for SHA-256 04506065c82b0f02…

MALICIOUS

PDF

71.4 KB Created: 2021-04-06 02:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a829f249bf1010badc018c9ffd17efd2 SHA-1: 487119a2771677c787ea4a953529eb67b1d12426 SHA-256: 04506065c82b0f022e9c25b15edab2cc7c8f9643c9ef7c98c89d88105ae587e2
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://dugedepap.ru/strik?utm_term=why+do+molecular+compounds+have+low+melting+points PDF link annotation
    • http://vegoletox.medianewsonline.com/embryology_inderbir_singh.pdfIn PDF document text
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/mojapanuroruk.pdfIn PDF document text
    • http://wigevopane.iblogger.org/gipeviwexebapevovira.pdfIn PDF document text
    • https://nitomono.weebly.com/uploads/1/3/1/4/131454496/4440864.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/jiranitimazagotafogev.pdfIn PDF document text
    • https://zolivapodi.weebly.com/uploads/1/3/5/3/135313307/40b1115fa.pdfIn PDF document text
    • http://ridaxaki.mywebcommunity.org/axum_kingdom.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/anomalies_in_database_with_example.pdfIn PDF document text
    • https://nujodobenume.weebly.com/uploads/1/3/4/4/134441993/c5049.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b33fa489-b84c-44e5-b2ad-7bef3c05940e/a_different_mirror_chapter_5_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/how_to_use_bryant_evolution_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ca2564-22ca-4da9-87ef-0a3b9222878a/matar_un_ruiseor_pelicula_reparto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4008e4d-5a36-467b-8c1d-36bd379629e3/pafaxun.pdfIn PDF document text
    • http://rofamotitasijud.rf.gd/arthashastra_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/93697374060.pdfIn PDF document text
    • http://numowun.rf.gd/75953976200.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/phase_1_and_phase_2_biotransformation_reactions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a87b1cc9-3b31-4786-ac23-9730bd019c8f/edo_female_names.pdfIn PDF document text
    • http://zimozovo.epizy.com/20049429417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23bfff62-7d82-43cd-8a7c-09f72ebb2789/26415074313.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E8 5752 bytes
SHA-256: c10f889b69241436eeace653ce69f58c367ebd586d25879301c6eee6e4890228
font_01_sfnt_off0000e97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 11316 bytes
SHA-256: cc3338698170c0a77a500d4dc9f309b13e952cdab5f4843e52863d2d5689a25f