Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a09f861edb2bfc…

MALICIOUS

PDF

77.7 KB Created: 2021-02-15 10:45:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f7a893ee257b3ca9d5782e3d92741b60 SHA-1: a2e7a5546bfda4b9544b28fe6259e332d48874de SHA-256: 78a09f861edb2bfc22b8ddeca01143487f453595443dd4c729d4c5560f4f4e38
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/aws?utm_term=south+movie+2019+new++hd+mp4 PDF link annotation
    • http://datinge.site/3408942868chq97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484356/normal_5fee747c4495b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530429/normal_5fd0dd363c67b.pdfIn PDF document text
    • http://blacktea.space/how_to_change_hamburger_icon_in_androidc02bb.pdfIn PDF document text
    • http://rubisteq.online/12969464249jedxc.pdfIn PDF document text
    • http://onlinesos.tech/nukolixibefamowerupezadof8hryn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5fdc1ab0ba779.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379377/normal_5ff56b016dda0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392658/normal_5ff04132c3940.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_601a666386344.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/ca376e8.pdfIn PDF document text
    • http://noverst.xyz/box_stuck_on_acquiring_application_informationm37se.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/fewifuwu/depamigukurezufep.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/data_checksum_corrector_file.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/teaching_receptive_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/arellano_university_senior_high_school_uniform.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE255 5392 bytes
SHA-256: 87fc9db1c8c8db510ea8ae47eccefedc297987c9c88d4949c44da75b7e37a5b1
font_01_sfnt_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 11372 bytes
SHA-256: 5b631f038ae9845424dd9087716f3a15c119ff5104fc337904ef08c54bb516ab
font_02_sfnt_off00011b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B20 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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