Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abc0eac4c1a09c4…

MALICIOUS

PDF

92.4 KB Created: 2021-03-19 16:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: adea63274c73471fec56dd88c6cbea7a SHA-1: 6dc041a798fc69b15ba84935b6dcc30be5a9c07e SHA-256: 8abc0eac4c1a09c412a11338deabe181722f6e995ac3445d5e5a6edec7866dc8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable domains and employing UTM parameters, indicative of a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a malicious document designed for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://maypoin.ru/strik?utm_term=french+irregular+verbs+conjugation+list+pdf PDF link annotation
    • https://bididanigatozum.weebly.com/uploads/1/3/4/3/134314142/2582200.pdfIn PDF document text
    • https://cdn.sqhk.co/jimikafede/aggogfR/blocky_mayhem_new_shooting_arcade_game.pdfIn PDF document text
    • http://shoop-fr.ru/sri_rudram_namakam_chamakam_youtuberrq45.pdfIn PDF document text
    • http://filopibat.22web.org/23603637665.pdfIn PDF document text
    • http://hookup671.site/how_is_zone_of_proximal_development_used_in_the_classroomgooj8.pdfIn PDF document text
    • https://bigifami.weebly.com/uploads/1/3/1/4/131407708/ac1fd.pdfIn PDF document text
    • https://lojimosaxamigek.weebly.com/uploads/1/3/5/9/135976806/zejujawe.pdfIn PDF document text
    • http://storeeuro.info/962814770500cfd2.pdfIn PDF document text
    • http://erse.xyz/24579543502i3s6l.pdfIn PDF document text
    • https://cdn.sqhk.co/rekosiseweno/giMibmY/desulemape.pdfIn PDF document text
    • http://kemytbok.xyz/32025981835aonw1.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/icijidS/drift_away_chords_uncle_kracker.pdfIn PDF document text
    • http://health-top.ru/rokubosumadiwoxidujedtlky.pdfIn PDF document text
    • http://basvuruizleme.online/dremel_tool_7700_battery42c7s.pdfIn PDF document text
    • http://nufudaluwunuja.22web.org/angular_4_form_example.pdfIn PDF document text
    • http://nutristrike-shop.ru/agricultural_vehicle_exemption_formrioc6.pdfIn PDF document text
    • http://pogadai.xyz/learn_carpentry-_wood_furniture._melamine._palette6t1mu.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/oeD3qJB/chromecast_app_fr_windows.pdfIn PDF document text
    • http://babarogumo.iblogger.org/vuzabexosenomuwovadofu.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://votanekojemuxu.epizy.com/football_manager_2016_database_editor_download.pdfIn PDF document text
    • http://jigisasamupor.onlinewebshop.net/cardiology_practical_handbook.pdfIn PDF document text
    • http://jumawivowibeb.onlinewebshop.net/89086837685.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50B 3312 bytes
SHA-256: 082c89522e4251f0a814862fddf633b1dac669eb780a02580130c1f52bfffe84
font_01_sfnt_off000100ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EC 5532 bytes
SHA-256: f89b4fe7cd3819be500bd66432a6396c08d67e8c669b08b77451748d3a3a0356
font_02_sfnt_off000113af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AF 13500 bytes
SHA-256: a4a09a7370108987a0611fcee120b6130add24f7bc7501ebe35f8f6c1fcb1adc
font_03_sfnt_off00013dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC6 16684 bytes
SHA-256: 4cd55fee6c52bbab32ed20b0b25846bff407090075fa0ab45dc9808449a8eeb0
font_04_sfnt_off000154e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154E1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2