Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedc015508635f84…

MALICIOUS

PDF

71.4 KB Created: 2021-03-04 13:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: aa9f4c7ef6b706646b91ba0b3f23837c SHA-1: 071346975bd20ef063ff592a5971ad22e9f8901a SHA-256: aedc015508635f84e87c22cf1591bfdabfbe253d49dddf63171381e2d02d4e5a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. The document body, though heavily obfuscated, appears to contain keywords related to a product search, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/wb?keyword=stihl%20ts%20420%20concrete%20saw%20price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485943/normal_603be3772b01d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378410/normal_6005fb48176a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382209/normal_5fd79988b154b.pdfIn PDF document text
    • http://yourbigdick.space/66846205312580sj.pdfIn PDF document text
    • http://everydayy.fun/92409913976ros7p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418985/normal_5fee7ebc1433a.pdfIn PDF document text
    • http://instapodarok365.site/how_to_solve_cat_questions_quicklykzka6.pdfIn PDF document text
    • http://topuniversityru.fun/2423683998581pgx.pdfIn PDF document text
    • http://kowabeli.iblogger.org/how_do_you_write_a_7th_grade_argumentative_essay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493891/normal_6040075ae99b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mubefula/71596412770.pdfIn PDF document text
    • http://gemimixobisuju.epizy.com/flight_simulator_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/balance_sheet_risk_management_program.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/36125629869.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/58473392444.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/asian_drama_for_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/zomujubipafimomakatux.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/singular_and_plural_worksheets_for_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/americas_test_kitchen_best_handheld_can_opener.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/44321371703.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/archangel_s_heart_free.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_off0000d3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CB 5576 bytes
SHA-256: 3e87c20c54f1bcc6303aa907d1dfbc8427ea410d27c74f7c7430fa56304911fa
font_01_sfnt_off0000e6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DA 11764 bytes
SHA-256: 24282b81d70082dbc0a1d6e85c04f24e2bfa915eb9f9015fd8f477c453b02c5d

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