Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49de7053c0a59fd…

MALICIOUS

PDF

86.6 KB Created: 2021-03-16 15:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4263110c9a673d6df495bf7e07b3425e SHA-1: 7534560423faed09d0a98cdc65627d9059b055d8 SHA-256: a49de7053c0a59fd2905e4cd7516da71e671fc4a972253689bb047dab244fa51
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://xajibur.ru/123?utm_term=clinical+pharmacy+pdf+drive PDF link annotation
    • http://tegubija.mypressonline.com/vce_to_converter_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/fhgYgcX/dominos_pizza_leones_cumbres_elite.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/basics_of_accounting_books.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/ihujhNv/entertainment_coupons_near_me_cheap.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/12503747302.pdfIn PDF document text
    • http://xugilerasifoveg.22web.org/ps4_power_and_eject_buttons_not_working.pdfIn PDF document text
    • http://motirepefasake.iblogger.org/31916891455.pdfIn PDF document text
    • http://govorudoxamelap.22web.org/83035801402.pdfIn PDF document text
    • http://apeech.ru/doluxiginoxilowebifokotzvdm.pdfIn PDF document text
    • http://powerpoint4you.ru/vestige_beauty_products2ozjj.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/MpXK2jg/definition_of_rank_of_a_matrix.pdfIn PDF document text
    • http://ronitojaxebibo.22web.org/gerotojogezavaxozoxidepip.pdfIn PDF document text
    • http://inertbhjbj.ru/tensor_calculus_vs_vector_calculusncrft.pdfIn PDF document text
    • http://stickerrus.ru/brandon_sanderson_mistborn_series_in_ordervlnhm.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/1entyhd/xazitodak.pdfIn PDF document text
    • http://yourdesk.website/72305435545kll78.pdfIn PDF document text
    • http://jakivuxevova.22web.org/mathemagic_assessment_test_6_answers.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/monster_hunter_2020_movie_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoxewijuja/vTgfVhY/wezatofomuzom.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/jdhePid/easy_earn_app_download.pdfIn PDF document text
    • http://notosebofe.iblogger.org/ascii_and_ebcdic_code.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/ariakvM/8908113391.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
    • http://ferodibev.onlinewebshop.net/lefixuwegisesabifuruzog.pdfIn PDF document text
    • http://litopojijerel.epizy.com/candy_crush_saga_mod_apk_unlimited_life.pdfIn PDF document text
    • http://zepinurubav.epizy.com/in_time_tamil_movie.pdfIn PDF document text
    • http://kodogama.epizy.com/45960472947.pdfIn PDF document text
    • http://zozemuki.rf.gd/fourier_analysis_excel_worksheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BF 5000 bytes
SHA-256: 854d85f708731944c2268439f99879e9525ccbeed578f17fae1b1c0b6ea24d12
font_01_sfnt_off0001048e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048E 10748 bytes
SHA-256: e1e1820c1547ca93e978633caa96934aab3c5e253227a0b2ad46a05a971acb6f
font_02_sfnt_off0001297e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297E 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_03_sfnt_off00013e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E16 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3