Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d1d399d2df7bc4…

MALICIOUS

PDF

76.2 KB Created: 2021-05-10 13:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ee4833044a9f3f8ffdb54814351022a0 SHA-1: 7cd3689f66f22e926488c153068216a4f37c7000 SHA-256: 22d1d399d2df7bc4ca73170a11fe99f16fb6e40d4c4e5073c1848d0e99553d64
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 0.9995

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://vilenefex.ru/strik?utm_term=the+mortal+instruments+film+review PDF link annotation
    • http://frukt.space/traductor_espaol_al_ingles_con_audio96oii.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/nizarobepafinaf-vifebadup-xigot.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/90345110727.pdfIn PDF document text
    • http://ecoservice-vlad.ru/89193856459atuiq.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/R6gip66/65958007003.pdfIn PDF document text
    • https://wugabatove.weebly.com/uploads/1/3/5/3/135318753/voxuputafidama.pdfIn PDF document text
    • https://jujodupif.weebly.com/uploads/1/3/2/3/132303189/tatijavad.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/hhjhggC/cheap_online_shopping_usa_clothing_stores.pdfIn PDF document text
    • https://fuvenaxumegiga.weebly.com/uploads/1/3/3/9/133999500/1192197.pdfIn PDF document text
    • https://revanesowokaw.weebly.com/uploads/1/3/4/6/134652238/94593425784.pdfIn PDF document text
    • https://cdn.sqhk.co/wemulekojex/g8jbidY/mibesetagifux.pdfIn PDF document text
    • http://merotudonor.mypressonline.com/40317732033.pdfIn PDF document text
    • http://subakegewoje.sportsontheweb.net/peguvo.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/iblvOjj/how_to_turn_facebook_mobile_to_dark_mode.pdfIn PDF document text
    • http://degimogug.mypressonline.com/english_language_learning_books_free_download.pdfIn PDF document text
    • http://nicepics.xyz/chordal_harmony_janek_gwizdalaqxq6q.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxeneson/iaZhbia/hits_1_radio_station_live.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0a3880f2-9bda-4900-b484-73a003b8a878.filesusr.com/ugd/3cbe5d_aa9973a37f914892b162598935ffd848.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/posidewudilemaguz.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/39285689473.pdfIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_1c687a432bdf4edda3b2bed186d3d7b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/kifenoremireju.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_off0000ee58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 5108 bytes
SHA-256: c283fdf870949f88f6ce1f771677a77b3a164156b56aa70cf3054d46f6746a20
font_01_sfnt_off0000ff9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9B 10460 bytes
SHA-256: 2fd064d26c47f323c9648d3b93f018c2ed6f0790535bb6ec8dda4a604ab3bfa9

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