Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63d03219d10e8cf…

MALICIOUS

PDF

115.9 KB Created: 2021-05-22 04:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ea105efec2dabd0531a26c0e9fa5f787 SHA-1: d4c4098bfa88c7ab506f39fc21dc29fc4d744172 SHA-256: a63d03219d10e8cf02930702dc078ffb1894e48736248533e74d11ca0b0971f2
186 Risk Score

Malware Insights

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

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 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=what+nba+players+played+for+the+harlem+globetrotters PDF link annotation
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/5282101.pdfIn PDF document text
    • https://suxosuliresud.weebly.com/uploads/1/3/5/3/135351283/darater-debovitapedawo.pdfIn PDF document text
    • https://suluxeposinugu.weebly.com/uploads/1/3/4/6/134634013/kubab-detoturozorixuv-wipijup.pdfIn PDF document text
    • https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/c497047f.pdfIn PDF document text
    • https://xavebebojemap.weebly.com/uploads/1/3/4/8/134848852/vuragipiveja_fuvamolawifozup_piwopaberiguk.pdfIn PDF document text
    • https://sabexinutix.weebly.com/uploads/1/3/0/7/130740027/0b50f2fcac5.pdfIn PDF document text
    • https://ramitafot.weebly.com/uploads/1/3/4/3/134340854/kibolasedivuz_roguwezi_womoxesazo.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/gijeguvidavagogibava.pdfIn PDF document text
    • https://lovetawufekevo.weebly.com/uploads/1/3/4/3/134339121/viwegelumig_fojilig_podeveroperufi.pdfIn PDF document text
    • https://xifuvago.weebly.com/uploads/1/3/0/8/130813557/6859643.pdfIn PDF document text
    • https://sotipazokelaxat.weebly.com/uploads/1/3/2/7/132712266/fotonitejasuzo_binolasovopibut_dinajamegajuvu.pdfIn PDF document text
    • https://ponatuxo.weebly.com/uploads/1/3/4/5/134596183/6299075.pdfIn PDF document text
    • https://pekedepak.weebly.com/uploads/1/3/5/3/135399439/gumoxaga.pdfIn PDF document text
    • https://xovonanukotu.weebly.com/uploads/1/3/4/8/134898985/61013e8ea7e9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9389d23d-0d24-4dc3-8853-ca511dafd4c0/gijogebexujedeg.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/22926684154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a37a6b2-f150-43f0-886f-136a5ffefe28/lunurelavesugojise.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/hinario_caboclo_guerreiro_vo_corrente.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/herbarium_sheet_of_rose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990db715-291b-4abc-a1c2-2305fb98a010/divinity_original_sin_enhanced_edition_walkthrough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d2f2573-a6a4-4b8f-94c8-c61e899ded51/casio_edifice_chronograph_wr100m.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ece33df-f35d-4441-b8db-0fc6cc6ef0c4/cloud_9_cravity_lyrics_romanized.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F5B 5712 bytes
SHA-256: 9d9f0d0eef6b1e95f66231a06afab60beda9b1237462f6f4ca77a24596fbac9f
font_01_sfnt_off000182b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182B3 11748 bytes
SHA-256: 5230507c5faab533345b9045d186d56252505342bbb41c88c9111e5bfbda74a0
font_02_sfnt_off0001aa9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA9F 16148 bytes
SHA-256: f2fe1b341ce625982f6229602509497cf1a9423964c663a7c58f6fce8010e377