Malicious PDF — malware analysis report

Static analysis result for SHA-256 63809ecaba42c4f1…

MALICIOUS

PDF

76.2 KB Created: 2021-03-01 04:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b50470f793fc64725e87ed836747cc36 SHA-1: f3d0ad4ac02b019dfd70ff59226c874fc8801d09 SHA-256: 63809ecaba42c4f1e41fd15cf43e32ad8a38459ca4b752ad87013f683c157cc2
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specific URL, 'https://ponafet.ru/aws?utm_term=english+bulldog+pumpkin+carving+stencil', is identified as a potential lure. The presence of many links suggests a link farm designed to obscure the true malicious destination, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/aws?utm_term=english+bulldog+pumpkin+carving+stencil PDF link annotation
    • https://cdn.sqhk.co/kewawukufiju/7ihphgP/35645488763.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426080/normal_600513e53e07f.pdfIn PDF document text
    • https://sejixegagetuta.weebly.com/uploads/1/3/0/9/130969850/nesobuzag.pdfIn PDF document text
    • http://wivevadevenumet.mywebcommunity.org/on_green_dolphin_street_miles_davis_transcription.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417214/normal_6034fcca478ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470218/normal_6022401b8aa91.pdfIn PDF document text
    • https://gobewuguwug.weebly.com/uploads/1/3/6/0/136056794/kinedigi_jamafodopor_tenitobap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470524/normal_5fd24c5ae31da.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/2009_ap_english_language_and_composition_free_response_questions_sample_essays.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374698/normal_5ffa851fa2388.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406789/normal_5fc7e0a9bd359.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/jaxonekef.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/9185810.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_5fcf0136e89af.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/dazovosugev/what_does_the_sun_symbolize_in_the_scarlet_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/65691514790.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/fobosaj.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/macronutrient_diet_recipe_guide.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_off0000ddfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFE 5592 bytes
SHA-256: 078ba2c1816786871c423cafd5c2a75c4e9ab8650bfc42f9653de63be2aaf8cc
font_01_sfnt_off0000f0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 10684 bytes
SHA-256: 54bb0677facbc1e1aa5bb6d41e2a4459fa85cd569939f6bf04f4908c7d893220
font_02_sfnt_off00011523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11523 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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