Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21676ea9d518789…

MALICIOUS

PDF

78.8 KB Created: 2021-02-22 04:34:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 19d5db50be29f8c2e497fc4c137875ad SHA-1: ccfaab4a6057720ea6c49aa432cf03d499c77671 SHA-256: e21676ea9d518789a08f0562d282aec83f775535906e81deed80c1b65a32d383
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary suspicious URL pointing to a domain known for redirecting to potentially malicious content. The document body, though heavily obfuscated, suggests a lure related to product adjustments, likely to trick users into visiting the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://jottigo.ru/strik?utm_term=tyrolia+sld+11+bindings+adjustment PDF link annotation
    • http://braco.ru/jubejoxe43hqn.pdfIn PDF document text
    • https://lurenosofen.weebly.com/uploads/1/3/0/7/130740325/giwodixudal.pdfIn PDF document text
    • http://ledy66.net/characteristics_of_project_proposal5zki0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452851/normal_5fe3c7f86e4f3.pdfIn PDF document text
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/todefazadigalosije.pdfIn PDF document text
    • http://prizinsta365.online/bumetoxiweridemozitexutiqxj8l.pdfIn PDF document text
    • http://moneymaya.site/load_cell_amplifier_hx711_datasheet7g3er.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/1999884.pdfIn PDF document text
    • https://wagalivo.weebly.com/uploads/1/3/0/8/130814328/884b375d5a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478398/normal_601042f572daa.pdfIn PDF document text
    • https://zavifojixu.weebly.com/uploads/1/3/3/9/133997579/tuzusa_xaxifovov_tupar.pdfIn PDF document text
    • http://topstudy.fun/kuvisugaq726q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446921/normal_601174284218f.pdfIn PDF document text
    • https://sixuvowapunara.weebly.com/uploads/1/3/0/7/130738553/bekezujebitigez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490920/normal_5fce7735294c6.pdfIn PDF document text
    • http://hot-money.fun/parenting_from_the_inside_out_by_daniel_j._siegelp3ijw.pdfIn PDF document text
    • http://rankingcoach-seo.com/old_church_hymns_sheet_musicw9f43.pdfIn PDF document text
    • https://pujibotawajifuw.weebly.com/uploads/1/3/1/3/131379639/6078514ff1e785.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/13281805730.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/1919178136.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/descargar_musica_de_anthony_santo_antologia_de_caricias.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/application_calculatrice_scientifique_android.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_off0000e9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 5348 bytes
SHA-256: b489e85a8189dbe719c7783d849b897d18d857a2cb64f51ed9c8c587fedbe1bc
font_01_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 10216 bytes
SHA-256: 52488537987de88bd854048827adc274f3b344e8e144f51366e8e5d1a8cb5afe
font_02_sfnt_off00011ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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