Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fff5c915b2d7ee…

MALICIOUS

PDF

75.3 KB Created: 2021-03-22 10:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f8d7d36aafe5462240fb2b313c491d21 SHA-1: 489734d265cd35eee34b0965f61695dee47c6b50 SHA-256: 38fff5c915b2d7ee731f8c114fc93634a2394a9beb3879a3f7e19446498cebf3
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/strik?utm_term=how+to+reset+omron+blood+pressure+monitor+bp786n PDF link annotation
    • https://cdn.sqhk.co/fobonelaga/bhaichh/girl_superhero_coloring_pages_to_print.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/richard_bertinet_crust.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/ji0ghgi/21920075556.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/how_to_put_baby_in_ergo_360_front_facing.pdfIn PDF document text
    • https://sunutefe.weebly.com/uploads/1/3/5/3/135350425/85465edcf89c38.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/76954896040.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/54889074078.pdfIn PDF document text
    • https://niregesop.weebly.com/uploads/1/3/0/7/130776037/kegijiwi.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/how_to_make_ac_to_dc_converter.pdfIn PDF document text
    • http://pijevovonojatev.iblogger.org/beginner_s_guide_to_digital_painting_in_photoshop_elements.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/98414967721.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/gipesaduluxutuzoxipowip.pdfIn PDF document text
    • http://dajexori.mypressonline.com/how_to_fix_a_clogged_badger_5_garbage_disposal.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/vib9Jid/among_us_2_beta.pdfIn PDF document text
    • https://cdn.sqhk.co/moromasi/zhbhgjd/stick_war_2_mod_apk_android.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/fqMjfZL/92873064547.pdfIn PDF document text
    • https://wapaberupuz.weebly.com/uploads/1/3/5/3/135397773/1363499.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zejibanunepi.myartsonline.com/69599694034.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/lalifukij.pdfIn PDF document text
    • http://jidodurej.epizy.com/kassadin_guide_pro_builds.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/simple_gdpr_policy_template_free.pdfIn PDF document text
    • http://jowokepo.atwebpages.com/free_ebook_reader_for_windows_7.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_off0000e84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 5516 bytes
SHA-256: 0edc66acd7d0abf1ce5d04ff09036d41bae88adb975cd6b9bf36337eab7e3855
font_01_sfnt_off0000fb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 10604 bytes
SHA-256: 538deaf86b24cb8bd451e602da10fb262dc3e8f3e11317d170b8d17d2203c56e

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