Malicious PDF — malware analysis report

Static analysis result for SHA-256 2318db2fbf686345…

MALICIOUS

PDF

85.0 KB Created: 2021-04-14 21:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0de7cb3bd55c86224ca0538e248bc5a9 SHA-1: 63c04fde131aff94fbc4c55d7125793644cf0619 SHA-256: 2318db2fbf686345becc0a5ab2a961e3e78a67bb0ef4f7e17dd69d3202d9565a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable hosting and exhibiting link farm characteristics, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further corroborate the malicious nature of the file. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=2007+chevrolet+impala+transmission+slipping PDF link annotation
    • http://tradestaroffice.com/43272196279dagcp.pdfIn PDF document text
    • http://garant-ritual.online/12831741129wy7sc.pdfIn PDF document text
    • http://wegansit.space/2004_honda_odyssey_anti_theft_radio_codep1385.pdfIn PDF document text
    • http://glossywp.online/weed_eater_blades_stihl26wny.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/igjh1jg/47963505749.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/avancemos_level_1_workbook.pdfIn PDF document text
    • http://zoosalon.org/988536709809sr.pdfIn PDF document text
    • http://autolombardpro.ru/refetegokutilekam8z60.pdfIn PDF document text
    • http://robertferrell.net/wd_my_passport_ultra_on_macg5dww.pdfIn PDF document text
    • http://igcopyrightverify.com/health_meter_scale_walmartlqrdb.pdfIn PDF document text
    • http://vijofudevadotar.mywebcommunity.org/sogufatisagemi.pdfIn PDF document text
    • http://select-get.top/consonant_blends_worksheets3v8dm.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/L4hehhf/89156692611.pdfIn PDF document text
    • https://cdn.sqhk.co/nufuwijili/aiijche/90922597155.pdfIn PDF document text
    • http://plafond.xyz/vtech_cordless_phone_with_answering_machine_manualhvrkp.pdfIn PDF document text
    • http://tuzupibu.scienceontheweb.net/namukotiwukeziledina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://modedavap.epizy.com/gta_vc_game_android_1.pdfIn PDF document text
    • http://bixerexexotepe.rf.gd/conflict_handling_styles_examples.pdfIn PDF document text
    • http://dijuruxowasi.epizy.com/super_mario_bros_2_3ds_world_3_tower_star_coins.pdfIn PDF document text
    • http://rutipozi.epizy.com/loxukakoser.pdfIn PDF document text
    • http://rugiselawanoli.rf.gd/principes_et_outils_de_l_amenagement_du_territoire.pdfIn PDF document text
    • http://sonarubitexo.atwebpages.com/xukarutosunowixa.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_off00010a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9B 5668 bytes
SHA-256: 7831b00782e4a8fdd988b41420a893efa94c3bbd2fc48436f8a93b84c28bd780
font_01_sfnt_off00011dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC3 11420 bytes
SHA-256: c21d28a06626ff8e3db07452b1a515f1d46a7e088330aeda3c99c08e6a8f6c14

Open this report in the interactive analyzer, or submit your own file for analysis.