Malicious PDF — malware analysis report

Static analysis result for SHA-256 3846654854825e07…

MALICIOUS

PDF

77.3 KB Created: 2021-03-10 17:28:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: be0c1825ece282de56413344173c5460 SHA-1: c223ddd3e33130773ab07fe75b55b6909c927426 SHA-256: 3846654854825e07c394b641f8eef654569e7bdcd9bb01255677b65e82fa2df5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/strik?utm_term=simple+electronics+projects+for+12th+students PDF link annotation
    • http://budokudepa.scienceontheweb.net/rifaluvazomifajakit.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/38518863023.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/GVigCfx/s_p_world_exploration_trends_2019.pdfIn PDF document text
    • http://fexewivu.iblogger.org/commonlit_answers_to_the_most_dangerous_game.pdfIn PDF document text
    • http://setovewurepenu.22web.org/58216364357.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/15090104482.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/jbji6bc/are_face_masks_required_by_law_in_pennsylvania.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/3hhp1gg/push_and_pop_assembly.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetijesi/9EOjdjg/jezegatatopija.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://naxepidibazugux.epizy.com/rekebovafilu.pdfIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_89f34ab9883b4eed8517b897f02d742a.pdf?index=trueIn PDF document text
    • http://zagizub.rf.gd/corporate_innovation_strategy_template.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_438cf6414a7543eb955b74ea4c48bc6f.pdf?index=trueIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_0d8881b732c142b7910edfda892279d2.pdf?index=trueIn PDF document text
    • http://dapufojutujat.atwebpages.com/39494073130.pdfIn PDF document text
    • http://worubag.epizy.com/geometry_definitions_matching_worksheet.pdfIn PDF document text
    • http://fujeraxujixu.epizy.com/how_to_train_your_dragon_series_in_order_movies.pdfIn PDF document text
    • http://nebegekiguwipaz.epizy.com/creating_a_budget_spreadsheet.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/is_cbr2f2_polar_or_non-polar._explain.pdfIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_660ca753200749c2abca329ec420abd4.pdf?index=trueIn 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_off0000ef70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 5548 bytes
SHA-256: ae2ed3817239fea02b3aa70cbb887c69cecfb4338e920f0c94f01913fae8ee20
font_01_sfnt_off00010230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10230 10856 bytes
SHA-256: a84ef6acea3b78b125da03c81b0a2e50f83d3e05255e68d6387d2c7ffca573e0

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