Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2efe446ebe4638d…

MALICIOUS

PDF

77.3 KB Created: 2021-05-02 19:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2c487cb615c628d11a0c0e2069ac191e SHA-1: 97154203fd70bef6d99fa453a0312cf73a4cb53e SHA-256: a2efe446ebe4638dbfcda71da1a201154618295c6c9ba517cb821feecc07340f
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a domain associated with phishing and link farming. The document body, though heavily obfuscated, appears to be a lure related to "kubota engine parts lookup". The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://maypoin.ru/strik?utm_term=d722+kubota+engine+parts+lookup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454813/normal_60458eade0195.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/Ciagjjh/top_speed_traffic_racer_car_racing_games_3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500417/normal_6041c33344f87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_604713680065e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468823/normal_5ffff3f8937a5.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/jahehgQ/41358572267.pdfIn PDF document text
    • https://cdn.sqhk.co/taxodisilif/dggSDjg/65059910657.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/chemistry_form_2_structure_and_bonding.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/ficd2pO/game_of_thrones_cast_season_10.pdfIn PDF document text
    • http://pinopizo.sportsontheweb.net/15115658324.pdfIn PDF document text
    • http://fatiberekizibu.iblogger.org/loripowuzugodakoliw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://subogerilazelo.atwebpages.com/kamomavili.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/70085300031.pdfIn PDF document text
    • http://ruzuzis.rf.gd/mathematics_form_3_exercise_with_answers.pdfIn PDF document text
    • http://vazorilumi.epizy.com/english_syntactic_analysis.pdfIn PDF document text
    • http://futebowa.atwebpages.com/biomaterials_science_an_introduction_to_materials_in_medicine_download.pdfIn PDF document text
    • http://rupevisa.epizy.com/scan_barcode_to_pc_android.pdfIn PDF document text
    • http://disozisujenat.epizy.com/fupuvajesezuzoputa.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/documentary_storyboard_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/zasoleronatananelaja.pdfIn PDF document text
    • http://fazafof.rf.gd/gekile.pdfIn PDF document text
    • http://wuwedutukuw.epizy.com/1002251736.pdfIn PDF document text
    • http://tezebidurob.epizy.com/bubob.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_off0000f028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF028 5404 bytes
SHA-256: 78f7ea776cb68ac678a0fc57a7c2f354cdd583cbaf1e4862a7a366ac5195ebc2
font_01_sfnt_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 10952 bytes
SHA-256: f316fe38807358a832242db97d7c57532328eafd1c67f197adf1d0440349ca73

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