Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3ab3f68c3f5411…

MALICIOUS

PDF

75.5 KB Created: 2021-04-07 22:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7369bf2e2e8ada101448d6476dee1c52 SHA-1: 2abbaccc67f722a9ab1290989a669fd1c02300b6 SHA-256: da3ab3f68c3f54111aec5a7a1cf3467a85d8c1d1eed7492efa18292683537b23
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to calculators or financial documents, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/123?utm_term=brrrr+calculator+excel
    • https://static.s123-cdn-static.com/uploads/4470038/normal_5ff9387b272f2.pdf
    • http://nutetuxiv.mygamesonline.org/zelilejugopumomovuzemen.pdf
    • https://cdn-cms.f-static.net/uploads/4418000/normal_60412a8f9b183.pdf
    • http://gagivukamuw.getenjoyment.net/profenid_gotas_bula.pdf
    • http://punejew.mygamesonline.org/agrarian_reform_law.pdf
    • https://static.s123-cdn-static.com/uploads/4383322/normal_6001807d3e39c.pdf
    • http://kadabafomelu.66ghz.com/supokikowesimarizem.pdf
    • http://xenakasewexibal.sportsontheweb.net/rural_sociology_as_a_science.pdf
    • https://cdn-cms.f-static.net/uploads/4374698/normal_5fd15c4f379b7.pdf
    • http://ferafukapawap.scienceontheweb.net/bedefijavasafokanikitov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_8643032a50d942c1a111a4942d6c0a55.pdf?index=true
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_a84a3d1dec0e44fdb703c470ded12abc.pdf?index=true
    • http://keregimuw.onlinewebshop.net/air_force_x_group_previous_year_question_paper.pdf
    • https://s3.amazonaws.com/migivewuwe/fiwimagakitozujokozimuv.pdf
    • https://s3.amazonaws.com/furunumaroxun/waludono.pdf
    • http://walogoke.epizy.com/35278890408.pdf
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_34617383180b42e680ee157f2a55556a.pdf?index=true
    • http://kirutitas.epizy.com/acids_bases_and_salts_class_7_mcq_worksheet.pdf
    • https://s3.amazonaws.com/jumedemimo/clases_de_ingles_houston_tx_gratis.pdf
    • http://suvalomimo.atwebpages.com/1st_grade_math_assessment_test.pdf
    • https://s3.amazonaws.com/nawosineromigi/fuwepufakijiwinibitu.pdf
    • https://s3.amazonaws.com/gebukil/best_offense_to_run_against_a_2-3_zone_defense.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2e.bin
2924af6c1b3da84df7dbedf9bd48a4ff393bf5acd7d92f93f37f41569a4780fe
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2E 4732 bytes
font_01_sfnt_off0000fb55.bin
826fee8fc117ca435c1281f84d6e0a97a3d772b5c07a43cd74f5183125d5b35a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB55 11088 bytes