Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ff6a47d278e8f4…

MALICIOUS

PDF

82.6 KB Created: 2021-04-03 07:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0dbe873840b7287846ca83b86479c287 SHA-1: 78db1e073db6c4bf3d47b51a37e2fdc7416231d8 SHA-256: e5ff6a47d278e8f448e5d11dec2f5a077f11722435caa48112d51ed0530ca66b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing lure, likely leading to a second-stage download or redirect to a malicious site.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=ejercicios+resueltos+de+limites+de+funciones+racionales In PDF document text
    • https://cdn-cms.f-static.net/uploads/4460457/normal_60673cdb07abf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469630/normal_5ff47e29d38a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_6056fcab4fa61.pdfIn PDF document text
    • http://kwini-fini.online/battle_islands_commanders_xbox_one95rz2.pdfIn PDF document text
    • http://lg-copyright.com/how_to_read_korean_easilyro6kz.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448332/normal_5ffd0491b8afd.pdfIn PDF document text
    • http://jushq.club/maytag_dishwasher_troubleshooting_guidevuc0r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5fd320e23f81e.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/jahdgcL/gejanegaxit.pdfIn PDF document text
    • https://cdn.sqhk.co/rusefijow/AahgjiJ/photo_background_remover_software_for_mac.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/what_color_is_mint_greenxk9ft.pdfIn PDF document text
    • https://cdn.sqhk.co/bejamisokepu/zfj0ejj/darurefotuxer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fifomi/stuart_hall_representation_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/athulya_ravi_images.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/true_metrix_free_meter_manufacturer_coupon.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/elements_of_programming_interviews_c_filetype.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/90063382111.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE72 5084 bytes
SHA-256: a350fd6fa175f170f469db6f673230dc759cc8a1c055fc9b7b07cb9f86a7fcaa
font_01_sfnt_off0000ef9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9B 11588 bytes
SHA-256: 945e2eb87f6b61e1766cf16958dbda62f3362495f62176b3c78306f741aff697
font_02_sfnt_off00011644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11644 16404 bytes
SHA-256: d800110be8686143fa3dabac73a524642c4b1890d38219758bc09eb08e5536e0
font_03_sfnt_off00012c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C58 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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