Malicious PDF — malware analysis report

Static analysis result for SHA-256 443285ee4fd55fb3…

MALICIOUS

PDF

138.4 KB Created: 2021-03-14 15:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2ee802f96d93a9f0c8029034303920f8 SHA-1: a170b161f6928b03c74eeb2ce47ffc066452cdac SHA-256: 443285ee4fd55fb3ffb2a2d41d53cc17ac49634aae959d95c08a3e4ed9a7565e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured to appear as search results or document titles, a common lure for phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to use these links for malicious purposes. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://baarspo.ru/strik?utm_term=the+genesis+6+conspiracy+gary+wayne+pdf PDF link annotation
    • http://koreanluxe.com/how_to_fix_roomba_charging_error_50ar7e.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/how_to_turn_on_a_samsung_syncmaster_monitor.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/how_to_fix_a_hoverboard_that_wont_turn_on.pdfIn PDF document text
    • http://sibasijiv.22web.org/the_merchant_of_venice_shylock_quotes_about_antonio.pdfIn PDF document text
    • http://afracheat2.xyz/what_do_arthritis_come_fromqpdrf.pdfIn PDF document text
    • http://zafibekimov.22web.org/jogete.pdfIn PDF document text
    • http://tumbochka.space/83472576360jqy67.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/portrait_drawing_for_beginners.pdfIn PDF document text
    • http://vudubelawagesat.22web.org/anti_liquor_movement.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/86164839478.pdfIn PDF document text
    • http://digitalcalakk1.xyz/13843657562hlqro.pdfIn PDF document text
    • http://crystal-light33.ru/free_baidu_antivirus_2015_offline_installeroixz6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://misukejijixuke.epizy.com/93500486306.pdfIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_aa064db70e71424886c5a206aadfb20c.pdf?index=trueIn PDF document text
    • http://desetezovadu.epizy.com/61919347578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2046aa2e-8b48-44ea-8d1c-72cc4c09b8ce/verbos_irregulares_en_ingles_presente_pasado_y_gerundio.pdfIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_4d6b457abc8446dcb711e6a807383ce5.pdf?index=trueIn PDF document text
    • http://xilibosukotijob.epizy.com/budore.pdfIn PDF document text
    • http://fexunipeguzizu.rf.gd/sapozavapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c66a82-6925-47ee-82a7-2aa7fe7d7f77/computer_science_illuminated_chapter_12_answers.pdfIn PDF document text
    • http://pigutun.myartsonline.com/65956794680.pdfIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_c8499586bda14c77a91acbff22b13ebd.pdf?index=trueIn PDF document text
    • http://bideliv.rf.gd/51840130511.pdfIn PDF document text
    • http://wewiritat.epizy.com/equivalent_isotropic_radiated_power.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd8a436-65a1-4c76-9fb2-ef907c39892f/wd_my_cloud_support_chat.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6AB 5684 bytes
SHA-256: 92a67ec24dbc43c8646217377c320e1f42dce98a61395e3535c51193c6779f30
font_01_sfnt_off0001da21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA21 11836 bytes
SHA-256: e635212490f2dee9dc4f8b02d911ae670d96cbe1dc2d66d773cf4ee2e7277148
font_02_sfnt_off0002027e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2027E 16452 bytes
SHA-256: 70910c3f157dffaa2a054d394904fab0505b6608f800f53ba54387c75c0d040c