Malicious PDF — malware analysis report

Static analysis result for SHA-256 d984e4e42d80b2f2…

MALICIOUS

PDF

76.2 KB Created: 2021-03-18 08:28:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: de178090ae7a6325c04f74adc89ff6ee SHA-1: 1eb67c97d4377f18572c04b7e8a200861612e7a3 SHA-256: d984e4e42d80b2f247a9b38f2992e311cd364700a513e1fd0f2e0139771aecbb
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 or suspicious domains, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=magic+elements+reborn+codes PDF link annotation
    • http://mscgis.net/biological_classification_mcq_for_neeta24s0.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/axis_bank_net_banking_form.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/bDGrBid/54405504312.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/iihiegc/swiped_fruits_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/ighaDjd/disney_battle_heroes_best_characters.pdfIn PDF document text
    • http://mixed-rootwork.com/excel_vba_range_find_daten8hp3.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/tizenuvimuxulesirurug.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/jih3vhb/ice_cream_roll_shop_near_me.pdfIn PDF document text
    • http://rankingcoach-apps.com/xikavedilezatijogojunefpy0yv.pdfIn PDF document text
    • https://cdn.sqhk.co/fopikudapom/knYAuNH/madepomexige.pdfIn PDF document text
    • http://frankiearvelo.com/nicolas_bourbaki_general_topologymnr64.pdfIn PDF document text
    • http://durowan.sportsontheweb.net/33692778451.pdfIn PDF document text
    • http://reduslimitalia-official.site/how_fast_is_a_1969_dodge_charger_daytonae6xki.pdfIn PDF document text
    • http://strgb2.ru/donipidobuvigevehc5w.pdfIn PDF document text
    • http://uplrezina.site/50475646312jn6bk.pdfIn PDF document text
    • http://xomaweluk.22web.org/dejovije.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pujusojup.epizy.com/sort_excel_sheets_alphabetically_vba.pdfIn PDF document text
    • http://tudozujuxijoz.rf.gd/diwexosaranonixo.pdfIn PDF document text
    • http://fizusosikirizi.epizy.com/doxorubicin_package_insert.pdfIn PDF document text
    • http://xezaretidatoro.onlinewebshop.net/rubagume.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/variwazijenojurefiwovof.pdfIn PDF document text
    • http://zuputes.atwebpages.com/libro_completo_para_aprender_frances.pdfIn PDF document text
    • http://lubudag.epizy.com/lefabavaxanezopif.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_off0000eaa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA6 5404 bytes
SHA-256: f4ff644db320fd727bbfb4c1f242aa736387f12ea4a30867d053300330e1325e
font_01_sfnt_off0000fcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF4 10724 bytes
SHA-256: 142a7e7db6a5f183053d8886723ea19a7ac918b2f2e944d4177056db1868f9a6

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