Malicious PDF — malware analysis report

Static analysis result for SHA-256 54270f615484f4de…

MALICIOUS

PDF

77.8 KB Created: 2021-03-20 20:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9ea4e3b81119b8e7cfa0622316d75089 SHA-1: 1e0b66b0948d50ac0fb41d25f9d9429efa189c5b SHA-256: 54270f615484f4de409a35ea75f729a39dfe9512cbd038f9ca10b6009a75848a
134 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The PDF contains numerous external URIs, many pointing to disposable hosting and employing UTM parameters, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be related to printer driver installation, a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/strik?utm_term=hp+laserjet+pro+100+color+mfp+m175nw+wireless+installation PDF link annotation
    • https://cdn.sqhk.co/molavagew/iczjbie/8421226755.pdfIn PDF document text
    • http://fezufizibum.mypressonline.com/arduino_code_for_dummies.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/P2iihak/40433895195.pdfIn PDF document text
    • https://cdn.sqhk.co/radofufalam/gihKghg/prescribing_guidelines_for_geriatric.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428061/normal_604d9fa97ebd9.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/ygjZ0ge/executive_jobs_san_antonio.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/hcjbhih/rebibigud.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/capitalization_in_finance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_604ac71470fc5.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hhbpqgf/halloween_decorations_near_me_now.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487888/normal_601049e603682.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467564/normal_5fca5ed03015b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_6044d6934c51c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/nubozakisifivigonek.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/35155945293.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/driver_scan_canon_lide_110.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/veterinary_drug_handbook_online_free.pdfIn PDF document text
    • http://kubitilabevovup.rf.gd/upsc_assistant_commandant_previous_year_question_papers.pdfIn PDF document text
    • http://weguxuwe.epizy.com/35651171216.pdfIn PDF document text
    • http://vorowoluxeku.rf.gd/77448395191.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/farmville_tropic_escape_guide_book.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_off0000f08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08F 5688 bytes
SHA-256: 430f42a2a0dc4bd311aeeca3d1d5453646c882cad4fa2d43f27c8e9f1e20fa43
font_01_sfnt_off000103f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F2 10376 bytes
SHA-256: ae400eb8fa0d049e560566022ed4db2f85b218baf1a2e5f8e7bc6d0188daffea

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