Malicious PDF — malware analysis report

Static analysis result for SHA-256 d838f2d13e3e54db…

MALICIOUS

PDF

71.9 KB Created: 2021-02-27 12:32:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4e28bd39942c1e8a80c0035a73083145 SHA-1: 82494308a64287cf215a09fde4a6c520d600128d SHA-256: d838f2d13e3e54db21849054db18a81f00aeff59e8cfca1b9cb098e37df983ad
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=book+of+lairs+2nd+edition+pdf PDF link annotation
    • https://kazoxinajajidu.weebly.com/uploads/1/3/2/8/132815758/fofuguguzizapan.pdfIn PDF document text
    • https://wemubutuve.weebly.com/uploads/1/3/6/0/136090051/gejisep.pdfIn PDF document text
    • https://gowigejovijori.weebly.com/uploads/1/3/0/7/130740297/fudixixovusosivo.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/jiagicg/ball_blast_app_hack.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/3151362f.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/kKiiNgj/hd_wallpapers_for_mobile_1920x1080_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/batovafakupo/iigjhbe/adobe_photoshop_fix_online.pdfIn PDF document text
    • https://danivuzi.weebly.com/uploads/1/3/2/6/132681213/4740710.pdfIn PDF document text
    • https://fukuperuka.weebly.com/uploads/1/3/4/8/134883813/viduvam-powaronifok.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/meteratomedusudafelazal.pdfIn PDF document text
    • http://lexanizisujufum.66ghz.com/advertisement_writing_format_cbse_class_11.pdfIn PDF document text
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/7244201.pdfIn PDF document text
    • http://wemexuj.22web.org/wepifo.pdfIn PDF document text
    • http://zefedupawomodos.22web.org/bi-_weekly_employee_timesheet_template_for_excel.pdfIn PDF document text
    • https://nifilova.weebly.com/uploads/1/3/0/7/130740060/4bdc2b83daf.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/jcjiuXr/jojipav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://levolavajoji.epizy.com/watercolor_artist_s_guide_to_exceptional_color.pdfIn PDF document text
    • http://wumuduwowuwi.rf.gd/idrivesafely_quiz_answers_chapter_3.pdfIn PDF document text
    • http://lepiwapugu.rf.gd/ludwig_s_angina_guidelines.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_off0000dc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0F 5280 bytes
SHA-256: fd31562de97fab30e93a067ee47d6a41aafc4a7af64ca45fba1ea5aa7b5f46e3
font_01_sfnt_off0000ee1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1E 10484 bytes
SHA-256: bca0261db948ab61aa33e9a8bdef3b775ac9e868a590048f7b7cb098782e50f2