Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb75149d1747ef2d…

MALICIOUS

PDF

78.0 KB Created: 2021-03-14 04:44:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 17347046a3666e37d8ec4ff86b70674b SHA-1: 39a56209392a3a35a467450d8f7a450312b990d7 SHA-256: eb75149d1747ef2df41f0b68774e191c62d3841c78b40312e998a67f88def8cf
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/wix?keyword=hay+day+hack+tool+download PDF link annotation
    • http://mobotav.22web.org/agnosia_adalah.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/61102762199.pdfIn PDF document text
    • http://sudedelanefozuk.66ghz.com/ieee_template_word_2016.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/read_the_bible_in_a_year_plan.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://uploads.strikinglycdn.com/files/fcd32fb0-08a1-476b-99f1-f40821a34941/xipozikoguxobofak.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/sujomejiwif.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/multiplication_worksheets_grade_3_0-_12.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/experian._co._uk_statutory_report.pdfIn PDF document text
    • http://gezibetaw.epizy.com/telephone_conversation_worksheets_esl_students.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/pujiruvoxunujagozibedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d322c632-d125-4e37-8460-4a5690216282/guxisuxeg.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/27005711484.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/aircare_humidifier_error_code_cf.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/is_there_a_sequel_to_pilgrims_progress.pdfIn PDF document text
    • http://vorasatijede.rf.gd/delete_duplicates_from_excel_sheet.pdfIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_bcdfb01df3364f7187b29204e3d56802.pdf?index=trueIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_534c381f21c04c7f860652600e769cbe.pdf?index=trueIn 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_off0000e6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B8 4596 bytes
SHA-256: 90c18b8bfd5af5a9e5b58156a522de7d461f93e1a2da42b02d3cba2d0b5a4da9
font_01_sfnt_off0000f655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF655 11168 bytes
SHA-256: fba0ba3e72018b767466c5ff78a93af0516264fac13f865ae0d4fb912fe44e18
font_02_sfnt_off00011c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C97 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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