Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae5b069940da3cb…

MALICIOUS

PDF

82.6 KB Created: 2021-03-20 04:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8eca3203a80612e80a579c5240da7dba SHA-1: 6c8bd9c4f84b0703e01059b5856e4d8b455fc8ab SHA-256: 1ae5b069940da3cb3807762b4d3d05bb60e420bddc12815d234383f721ac9ff5
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links. While no scripts were explicitly extracted, the nature of the link farm suggests it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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 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://mezovuduw.ru/wix?keyword=rwby+cinder+fall+death PDF link annotation
    • http://nejevefivi.mypressonline.com/79727604487.pdfIn PDF document text
    • https://fegowudabe.weebly.com/uploads/1/3/1/4/131438077/vidowebun.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/63864604095.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/28915695688.pdfIn PDF document text
    • https://gulapizebulo.weebly.com/uploads/1/3/1/0/131070336/42638d3a05928f.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/building_construction_civil_engineering.pdfIn PDF document text
    • http://dawezedelofeda.scienceontheweb.net/blown_film_extrusion_training.pdfIn PDF document text
    • http://xebubux.sportsontheweb.net/vuxukajeronisovibibid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460954/normal_60494551d663f.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/dajabowunajif.pdfIn PDF document text
    • http://sekelenogake.getenjoyment.net/bsc_banking_and_finance_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450044/normal_5fce724eb34fa.pdfIn PDF document text
    • https://xuvolujib.weebly.com/uploads/1/3/4/3/134311221/velekesa-pazara-kebojuremoduf.pdfIn PDF document text
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/ligebasone_rasiwopipaja_xegafubom.pdfIn PDF document text
    • https://josuriwomevopi.weebly.com/uploads/1/3/4/7/134769094/gekupub_nepax_bozojegeviwe_vepuguleme.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/kozewuposoridil/kegotapuxavitiwevubotulud.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/ielts_writing_band_9_answers.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/84230755727.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/benzoilmetronidazol_ems_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/john_deere_gator_hpx_4x4_diesel_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/77533323042.pdfIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_f2107ce68a62458ab3b85102441092a6.pdf?index=trueIn PDF document text
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_3ca07d656f424597bf5b130d7b065732.pdf?index=trueIn PDF document text
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_37b0eab05e5e46018c3e1e458c0b7d5a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/333680513.pdfIn PDF document text
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_47fa6ac008d54b7fb42d16ab20889c75.pdf?index=trueIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_9a51071296d84058812b5e4da04e0d6a.pdf?index=trueIn 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_off0000fab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB3 5272 bytes
SHA-256: eaf5b9cd03dc23bb197e591a7e2684e44e3c9b06830382fa5740509d8e042616
font_01_sfnt_off00010ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA9 2484 bytes
SHA-256: 909920d59ddcd7400d5b16728594da0562fc837a6481ae8da612848d2627a5f6
font_02_sfnt_off00011749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11749 10804 bytes
SHA-256: c1fbcd19303c64431972feeb719482cfb0068475fc14f36f6152239f5c640459

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