Malicious PDF — malware analysis report

Static analysis result for SHA-256 da34014e74d82ece…

MALICIOUS

PDF

119.7 KB Created: 2021-02-04 11:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: facb66a64378e8a4c8e11e82fba80af2 SHA-1: 95600085a0c21a63e6c3a138a2755a85fbc93434 SHA-256: da34014e74d82ece655eb37d87a209ac166619bd87ea10a35df11b933a077ee0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wb?keyword=dungeon%20world%20thief%20character%20sheet'. This indicates the document's primary purpose is to lure the user to this malicious URL. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of PDF redirects often involves embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://crophysi.ru/wb?keyword=dungeon%20world%20thief%20character%20sheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4495849/normal_6012128e881ee.pdfIn PDF document text
    • http://kutufirix.iblogger.org/airline_manager_2_easter_egg_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401694/normal_5fe69cf7ea81a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369146/normal_5fee882b3eed7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_5fd160735a81c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465387/normal_5ff7d08cc699a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443802/normal_5fe5e207e8d05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_601867afd734e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483610/normal_5ff66b345fe92.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/divexikav/kshatriya_hd_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/71328798906.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/kudiso.pdfIn PDF document text
    • http://naremijex.epizy.com/jebizuwibevezasivew.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/android_module_dependency_implementation.pdfIn PDF document text
    • http://botibaxar.rf.gd/law_office_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/25904482463.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/zusavebezilivaji.pdfIn PDF document text
    • http://lenixad.epizy.com/bexezobasumopumexoxixunu.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/sharekhan_internship_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/travel_brochure_template_microsoft_publisher.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_off00019995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19995 5376 bytes
SHA-256: fc98f0841f38839d3af26f681cc380fe2b28f1556839573385d58162f7f42c9f
font_01_sfnt_off0001abeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABEB 10932 bytes
SHA-256: 77c0382147afb0bed4ae06753d104bde470bcf51974143eaabf7a2b4d9378e44

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