Malicious PDF — malware analysis report

Static analysis result for SHA-256 814d09ce416b5ffc…

MALICIOUS

PDF

88.4 KB Created: 2021-03-31 03:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fa70cdc856de2c2e4ae0a914e6cd5243 SHA-1: 618631e7d2df1ec1a86c20d39b3a6ace1919ee94 SHA-256: 814d09ce416b5ffc6bbd6bffb5e46c576730f34c1ae5dc0585604cc7348d3afe
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing for Amazon. It contains numerous external URIs, many pointing to disposable hosting, and one specific URL is identified as an abused redirector. The ML classifier output of 0.999704 strongly indicates malicious intent, likely to lure users into providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://pifabesi.weebly.com/uploads/1/3/5/9/135958575/9776431.pdf.
  • 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://baarspo.ru/strik?utm_term=mankiw+principles+of+economics+9th+edition PDF link annotation
    • http://pearhaidhr.fun/70659869069zi2e8.pdfIn PDF document text
    • https://pifabesi.weebly.com/uploads/1/3/5/9/135958575/9776431.pdfIn PDF document text
    • http://luxomozuk.mypressonline.com/piscicultura_en_honduras.pdfIn PDF document text
    • http://karaulovlife.site/spelling_books_for_second_gradepk80k.pdfIn PDF document text
    • http://ca-management.website/ship_cargo_manifest_formrv6fe.pdfIn PDF document text
    • https://ruwevuvav.weebly.com/uploads/1/3/5/3/135387918/tikusuza.pdfIn PDF document text
    • http://pribor-poverka.site/tutinivuzinvj9im.pdfIn PDF document text
    • http://silver35.ru/how_to_use_a_yeti_microphonejm9fg.pdfIn PDF document text
    • http://alisabor.design/radio_rock_online_classicbvbbc.pdfIn PDF document text
    • https://kimuremosov.weebly.com/uploads/1/3/4/7/134732255/bagofobaru-subavaz.pdfIn PDF document text
    • https://ligonulijer.weebly.com/uploads/1/3/5/3/135318365/a223b2ba.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/silubebebefuju/88932313958.pdfIn PDF document text
    • http://kopolug.myartsonline.com/69984639194.pdfIn PDF document text
    • http://zokaramizixa.atwebpages.com/sebusolupevizirijaminaja.pdfIn PDF document text
    • http://nafaradevofipaf.myartsonline.com/libros_de_harry_potter_en_espaol_para_leer.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/spanish_to_english_translation_app_for_pc.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/basic_engineering_drawing_book_download.pdfIn PDF document text
    • http://sujunutab.atwebpages.com/jupiter_the_bringer_of_jollity.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/introduction_to_algebraic_geometry_serge_lang.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/93913099450.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5E 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off000118a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A1 5712 bytes
SHA-256: c66160ceb83c0c43639ffaee4afa1a0dd5ce6b07d11b623d839a47d6c7ba77ef
font_02_sfnt_off00012c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C06 12212 bytes
SHA-256: fad60edbda6fdc0dc8ee8dbe4da63f184a4f87c67bfd55e7de17b122a3c2d659

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