Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c3bca755a50e5e…

MALICIOUS

PDF

80.9 KB Created: 2021-05-12 01:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6a7da3f46aa060bfd5289e6848e7be0d SHA-1: ddf9d49ef120756b57fdd3ad156a2ad89e1a75ec SHA-256: d0c3bca755a50e5e851d288c037e58df3083a83484d15889d369e62380be4fbb
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution vector, likely initiated via spearphishing.

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://golowaki.ru/strik?utm_term=how+to+install+redi+shade PDF link annotation
    • https://cdn.sqhk.co/mepowokugo/bghjKid/princess_daughter_beauty_spa_dungun.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/ihgicWf/rozup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_605680bce6009.pdfIn PDF document text
    • http://expressvpn.store/kanuzitefutavimirce3q.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/classical_guitar_exercises.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/sozuzuxugasimesuva0kkm8.pdfIn PDF document text
    • http://wijutomotagam.mypressonline.com/sc_dmv_forms_for_real_id.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443803/normal_6013bd9fe7bca.pdfIn PDF document text
    • https://cdn.sqhk.co/rodosidebo/mmVLjiY/dumalufape.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/adjective_clause_lesson_plan5eb6p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501364/normal_5ff7a8178a726.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456728/normal_5fed60b7a2ed1.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/nNhbIgf/banorafumelomo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372702/normal_60011df6a65a0.pdfIn PDF document text
    • http://save50it.info/bloatware_remover_apktoyot.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://kugukokoner.myartsonline.com/famododibesesip.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/can_am_outlander_650_service_intervals.pdfIn PDF document text
    • http://segimoto.myartsonline.com/misery_stephen_king_movie_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/que_significa_que_un_nio_tenga_ojeras.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/32752045845.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/98589293939.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/63499497836.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 4752 bytes
SHA-256: fa9d0610214fc17045e5fac7407d450475b3df93d3ff53f376f417d36f6cc821
font_01_sfnt_off0000fdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD5 11896 bytes
SHA-256: d4f83c1d91863c6692db6fd4d1dbb12ac5aa96eee807fd6d1bf620d2d3188bf2
font_02_sfnt_off00012660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12660 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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