Malicious PDF — malware analysis report

Static analysis result for SHA-256 612e481168b94cd8…

MALICIOUS

PDF

86.1 KB Created: 2021-05-12 01:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4516e3c144fd5ba797c23e1dda59d5bd SHA-1: 17681b5017547f238aa69f4058dea3dea4ed37e8 SHA-256: 612e481168b94cd8265950b09892ff5c90c436b75befe5581f5623a4c8e4f5c1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/strik?utm_term=how+to+clean+bissell+proheat+2x+pet+pro PDF link annotation
    • https://cdn.sqhk.co/jidelugob/ehaghhd/vofogavisovipifip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407781/normal_5fd2631fe75f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5fd776031c7c3.pdfIn PDF document text
    • http://kenaxifinot.22web.org/dangerous_driving_sentencing_guidelines_cps.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/hbSf3hb/togotuxose.pdfIn PDF document text
    • http://dajexori.mypressonline.com/el_abc_del_aprendizaje_cooperativo_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/hhh1ifS/stick_war_stickman_battle_2020_apk.pdfIn PDF document text
    • http://rokuboxajiga.medianewsonline.com/81784851590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489839/normal_5fd91ab765811.pdfIn PDF document text
    • http://nigodofifulo.scienceontheweb.net/60500866240.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/i9uqzhd/bevefomarilojilogalemo.pdfIn PDF document text
    • http://rodisawikikofu.medianewsonline.com/mi_planta_de_naranja_lima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_604b0b93c9e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415292/normal_5fd3b555509d8.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/Gdhcvie/35765532762.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402014/normal_6001da69d58e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fcd9831c0cc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://miripiwamaza.epizy.com/bizupiza.pdfIn PDF document text
    • http://sigivopowofode.epizy.com/the_economist_magazine.pdfIn PDF document text
    • http://pozirumine.epizy.com/general_ledger_financial_reporting_system.pdfIn PDF document text
    • http://jewofeket.onlinewebshop.net/gumepopadabapu.pdfIn PDF document text
    • http://banobozibijur.epizy.com/15833963278.pdfIn PDF document text
    • http://batevawave.epizy.com/how_to_apply_vinyl_decal_to_glass_door.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F82 5412 bytes
SHA-256: 8a3ddc50dd5ad2be3010a2b40adeab8f701ccaa8cd5fca100672893c23698fdc
font_01_sfnt_off000121f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F5 11952 bytes
SHA-256: fd8e3b38e02dcc67747e1aff81f31176c4aaaf513b20520f5c7734602e124436

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