Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6e384ffc1f394d…

MALICIOUS

PDF

97.0 KB Created: 2021-04-16 07:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 268f5c116249b6c334b1db2aa95b222e SHA-1: 200920af6774a84365b92c6eef565da0c495acef SHA-256: 9d6e384ffc1f394de2c79d6539040aa5627786fbaaf9861df65f4c11dd311fe5
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan and by an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to be related to a worksheet, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=5.2+congruent+polygons+worksheet+answers
    • https://zufefofavenubu.weebly.com/uploads/1/3/0/7/130775539/2775790.pdf
    • http://vakiduweg.mygamesonline.org/pablo_neruda_poemas_cortos_de_amistad.pdf
    • https://muwubuzegutan.weebly.com/uploads/1/3/4/6/134649477/nomew_gonozozetiju_busokimoxiwito.pdf
    • https://dubilovatigalis.weebly.com/uploads/1/3/4/7/134701517/a54686717.pdf
    • https://cdn-cms.f-static.net/uploads/4497346/normal_6047e52d8cde8.pdf
    • https://cdn-cms.f-static.net/uploads/4412900/normal_6015a9805dd71.pdf
    • https://cdn-cms.f-static.net/uploads/4488570/normal_604ccdfe7ad7a.pdf
    • https://zoxujaratufopa.weebly.com/uploads/1/3/5/3/135399722/862a47070f55.pdf
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/70d5cade7186f.pdf
    • https://xifutasuwisesa.weebly.com/uploads/1/3/2/3/132302919/likolewurukalarep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jamenajiko.myartsonline.com/tutorial_agisoft_photoscan_indonesia.pdf
    • https://uploads.strikinglycdn.com/files/32772bf8-cce2-4243-8ae0-83c5e7dbedf3/computer_programming_summer_camp_for_high_school_students.pdf
    • https://s3.amazonaws.com/setaxilitozuko/11174748452.pdf
    • https://uploads.strikinglycdn.com/files/0834340c-2d14-4463-9a08-75cfd1e56a03/adobe_premiere_pro_cc_2016_requirements.pdf
    • https://s3.amazonaws.com/wizidimawag/avengers_movies_2019_in_tamil.pdf
    • https://uploads.strikinglycdn.com/files/602228d6-27d1-4925-a0ff-464f7c57237c/how_to_reset_kwikset_smartcode_911.pdf
    • http://wivaxodi.onlinewebshop.net/madiminegabuzedudir.pdf
    • https://s3.amazonaws.com/dazinibonofobi/matt_jewellery_design_templates.pdf
    • https://uploads.strikinglycdn.com/files/5c70903e-02a3-4a2a-8a45-99bac38a9d1b/xagodojugoxanopi.pdf
    • http://kalasoziluxolim.myartsonline.com/saxebare.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120ec.bin
1e2df540d43a29499c1c223440a551164a60fd3b9e4c974ad5ed8eaca573ae05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120EC 5644 bytes
font_01_sfnt_off00013447.bin
66b0eb5e65f88eb3abdb95424ede378e90c35138784a78656491e99a7d7e5eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13447 14104 bytes
font_02_sfnt_off0001616e.bin
a8d9e7169be9325d5e329e50303585bd9fe60cd4fba86fc4ee5305143dfda526		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1616E 16164 bytes

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