Malicious PDF — malware analysis report

Static analysis result for SHA-256 379b2a4fd77e4af1…

MALICIOUS

PDF

109.3 KB Created: 2021-03-17 16:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c0b9cbbd3719335d10253c3ce3b016de SHA-1: 8ee0e4e7a8b90df49647554badb6ce67837ec848 SHA-256: 379b2a4fd77e4af1673c8fe857b9f09c0398b024dbbcff7cc9144327b9c1e344
126 Risk Score

Malware Insights

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

The PDF contains embedded links and is flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious and phishing-related. The document body, though partially corrupted, suggests a lure related to Excel functions, which is a common tactic for phishing or malware delivery. The presence of numerous external URIs, many hosted on disposable domains, further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=que+tipos+de+funciones+existen+en+excel PDF link annotation
    • http://lnstagramoriginal.com/vosopute74ytk.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/75992818932.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/lejojejatoledijosuperan.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/vanasarekiwozoji.pdfIn PDF document text
    • http://gedirobidepud.scienceontheweb.net/71701108276.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/wizujawirud.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/putizalusi.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/how_to_use_the_zojirushi_bread_machine.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/the_miseducation_of_cameron_post_christian_review.pdfIn PDF document text
    • http://pifafixejizigu.scienceontheweb.net/area_of_triangle_worksheet_6th_grade.pdfIn PDF document text
    • http://vafakewa.iblogger.org/telezanorewilujufaxosurux.pdfIn PDF document text
    • http://faceit.su/is_sheep_wool_fire_resistant5dh01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxodanokijaj.atwebpages.com/tikefitafofowavixew.pdfIn PDF document text
    • http://nokefibazapowem.rf.gd/free_colouring_sheets_paw_patrol.pdfIn PDF document text
    • http://tipiwozametorol.epizy.com/70159784961.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/25516233935.pdfIn PDF document text
    • http://sawurawefivovo.myartsonline.com/mizoloromusezifapoteluzu.pdfIn PDF document text
    • http://dupepoge.onlinewebshop.net/sunbeam_heated_blanket_microplush_10_heat_settings_garnet_full.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/a_level_biology_biodiversity_notes.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_ffd88ae3424e4370acff875d66743f4a.pdf?index=trueIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_6724c338254c49808974e7e72e528a61.pdf?index=trueIn PDF document text
    • https://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_d37f115f2b31480ea735c889e52a4ea3.pdf?index=trueIn PDF document text
    • http://zesafemumibow.myartsonline.com/how_to_use_pictochat_on_ds_lite.pdfIn PDF document text
    • http://kofipazefoleris.epizy.com/papyrus_font_google_docs.pdfIn PDF document text
    • http://panobamufa.epizy.com/brgschaft_vorlage_miete.pdfIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_1075c6871cf249be97627c6e71339b0a.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.

FilenameKindSourceSize
font_00_sfnt_off00016a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A65 4972 bytes
SHA-256: a0dcc6f4a116117a7bf8c055e8b140f8f2d81d81e79db7c64b098b562d8b684a
font_01_sfnt_off00017b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B73 13196 bytes
SHA-256: f11395e57925d999743ee6b7e713538a4c9986b17e4a6aa8f7808fe4fd0b6043

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