Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb0e09bf037c0c2…

MALICIOUS

PDF

83.5 KB Created: 2021-04-02 11:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 904ab1b110695f1f2d5048920360a7c9 SHA-1: 7f1057cf60302bef619c5914b86d42d34b570838 SHA-256: eeb0e09bf037c0c262ec0ed3fcc677f882ed84d29a054645f43d6711f0a025f9
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains text related to heating crab legs, which is likely a lure to disguise the malicious intent of directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=what+is+the+best+way+to+heat+up+crab+legs PDF link annotation
    • http://tidirakozodawon.getenjoyment.net/honda_eu2000i_weight.pdfIn PDF document text
    • http://newutatokulu.getenjoyment.net/las_28_creencias_adventistas_para_jovenes.pdfIn PDF document text
    • https://sipinawuzukefo.weebly.com/uploads/1/3/1/4/131410227/luwejekose.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/carbothane_134_hs_product_data_sheet.pdfIn PDF document text
    • http://mujorofujezigi.iblogger.org/pagalworld_movies_2016_bollywood.pdfIn PDF document text
    • https://bufopavebusi.weebly.com/uploads/1/3/4/8/134853568/888924.pdfIn PDF document text
    • http://misulilexu.22web.org/webepediruvaf.pdfIn PDF document text
    • https://lififamofupuge.weebly.com/uploads/1/3/4/3/134317858/57673c6215.pdfIn PDF document text
    • https://nonaxoboru.weebly.com/uploads/1/3/4/4/134467623/joxelafa-witinazemewo.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/xudusokifuwi.pdfIn PDF document text
    • http://jufifijawewuwik.iblogger.org/tutorial_bascom_avr_espaol.pdfIn PDF document text
    • http://stankoff.org/murorirulebugoboduvawiguw98csn.pdfIn PDF document text
    • http://plsale.pro/gangsta_granny_chapter_1d7uqj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xokesuluz.epizy.com/cricket_news_video.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/man_the_unknown.pdfIn PDF document text
    • http://pidazedovag.epizy.com/amazon_echo_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/98322111411.pdfIn PDF document text
    • http://zininorenedalo.onlinewebshop.net/vesipukurisevotapi.pdfIn PDF document text
    • http://logiweliziweje.onlinewebshop.net/archeology_books.pdfIn PDF document text
    • http://pawesew.epizy.com/bhagavathi_hd_full_movie_free.pdfIn PDF document text
    • http://zusomiverufal.rf.gd/6613437529.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/how_to_treat_coliform_in_well_water.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/autocad_2014_tutorial_-_second_level_3d_modeling.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_off00010654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10654 5540 bytes
SHA-256: 88f19d59fea751563d2e3e4d533f49af25182621cf940b7fb64126a7b090406f
font_01_sfnt_off00011943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11943 11700 bytes
SHA-256: 92e97ecca9d48dd2908c1f7b15a1bc2e0c575425374f6d00bb75919818e5f6be

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