Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbda759fe25dfd2…

MALICIOUS

PDF

74.4 KB Created: 2021-03-10 03:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a8a669337c8cfdc25a4a3a117fcc3e59 SHA-1: 182dea77c5fd082b51ae16e6f941b4e99ad212c0 SHA-256: bcbda759fe25dfd25879cead0daffffb8f03ae12e06f44fe3b7faf297134b03a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://ponafet.ru/award?keyword=iti+book+pdf+free+download PDF link annotation
    • http://zamowafa.mywebcommunity.org/how_to_clean_nespresso_aeroccino_3.pdfIn PDF document text
    • http://future-techno.ru/visumavodegujizlpezk.pdfIn PDF document text
    • http://wedavinonuvovu.22web.org/camille_claudel_movie.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/cours_de_franais_niveau_b2.pdfIn PDF document text
    • http://sagedix.medianewsonline.com/is_me_before_you_on_netflix_2020.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/g_shock_3230_band.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/vosaro.pdfIn PDF document text
    • http://livethailand.fun/maximum_time_difference_between_two_countries_answerssd228.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/how_to_create_a_training_manual_in_microsoft_word.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nibizuladode.onlinewebshop.net/zegaridibebipun.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/digital_marketing_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/pasoxan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992bf84a-5e05-42ce-97b9-8ab3070628e9/how_to_wear_gas_mask.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac26983-4dec-45ed-998f-8e88f008d6e2/machine_learning_or_artificial_intelligence_quora.pdfIn PDF document text
    • http://litufowanukoro.epizy.com/change_adobe_to_word_document_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/90669651541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a271ba47-e08c-4afa-ae25-826f13f7507e/nemoti.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/soda_water_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/chhatrapati_shivaji_maharaj_photo_free.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_off0000e88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88B 5088 bytes
SHA-256: 2a287ee0edc8fc05ac68e8e0e02f65d3a5630980c7145e19f24853c39ce643d9
font_01_sfnt_off0000f9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 10264 bytes
SHA-256: e8848a26517b2c4a8dc8845132554d2c500b03e2bf4a235d37572e848dd0de79

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