Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e160499548cc41…

MALICIOUS

PDF

104.4 KB Created: 2021-03-31 23:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 92bc71e110e003f84a7b1359d8f92503 SHA-1: 9563b131477642c71395d376898cbc4d6b2e4c6f SHA-256: 63e160499548cc41248c1cb6d4b4444e7a924ef27cf2d0b62414e396d7a7d24c
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 0.9995

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://dugedepap.ru/123?utm_term=transformers+animated+megatron+vs+starscream PDF link annotation
    • https://cdn.sqhk.co/kizajituxab/1hjttKC/ios_app_store_advanced_search.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/gjiegjg/middle_school_science_test_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_603fdfbbcdf6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447086/normal_5fcd093a6350c.pdfIn PDF document text
    • https://cdn.sqhk.co/vowogada/jgLzhfJ/mi_screen_recorder_apk_old_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375358/normal_604324a414a8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_600a81cd69eb7.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/QqjciaV/cruise_from_galveston_to_key_west.pdfIn PDF document text
    • https://tazipapanora.weebly.com/uploads/1/3/0/7/130776418/7cc0c6add6ce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_6023ca2a1a81f.pdfIn PDF document text
    • https://dejoputaxili.weebly.com/uploads/1/3/4/7/134763817/rilederad_nodarasibip_babur.pdfIn PDF document text
    • https://cdn.sqhk.co/xegapanasa/fgIbTHP/one_good_deed_david_baldacci_synopsis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461751/normal_603be29ebd9c1.pdfIn PDF document text
    • https://fiwobezamarevev.weebly.com/uploads/1/3/2/7/132740324/tewotofegazage.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/jHctagg/17979604864.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370062/normal_6004b7113fd06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419235/normal_5ffce3b0eb335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404725/normal_60110621be527.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a47af2b-297c-4347-aa8e-85447fe0ef6c/28260632335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0479ba03-926f-4527-8547-004298a02b20/gekowidiseworobewib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d62d5cbd-c598-41f7-b063-e02b4561ae2a/8358046899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76378ed6-9a92-4ce9-af3f-8bd29ef6a7af/zaxbys_job_application.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_off00015d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D87 5316 bytes
SHA-256: 74e16db0fb0a332094018d2d7f462efa580fc8fd968d84534d21c89a4becdc6a
font_01_sfnt_off00016f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F8E 10432 bytes
SHA-256: b978d76cca2a500d886223526ea5e37101ec9a03d637e12bfb1be3ca129cffe8

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