Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1f4aa1d1b9e97f…

MALICIOUS

PDF

66.2 KB Created: 2021-02-23 10:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9685cf2b09020347eea793cc8d1d5ffb SHA-1: feb96d8452b58d588908d60df891349fe245415e SHA-256: 1a1f4aa1d1b9e97f31d4ce062011fdb002744e23564d596d01852d5322c7f155
126 Risk Score

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 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://druttle.ru/wix?keyword=molecular+compound+worksheet+8.1 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381759/normal_5fcce848c0c30.pdfIn PDF document text
    • http://copyrightviolationcenters.com/lipenidineselinop7xd.pdfIn PDF document text
    • http://biwejobezimije.22web.org/barron_s_sat_biology_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/gcMjfIv/woturelosukubupen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504788/normal_60102f8cd654e.pdfIn PDF document text
    • https://nexitikobimefa.weebly.com/uploads/1/3/0/7/130776699/kamubijilan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454425/normal_5fcb7a04004dc.pdfIn PDF document text
    • https://verijijul.weebly.com/uploads/1/3/4/8/134861220/fawakas.pdfIn PDF document text
    • http://katagonubazi.22web.org/efectum_no_watermark_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380068/normal_5fcf24b887839.pdfIn PDF document text
    • http://umniashka.ru/modegevotajitorurue3j1f.pdfIn PDF document text
    • http://gbarb.me/minugajexabepalst7d.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/temoxumuluru-wilikigotige-fuzofumifeba-fomeluxagekulaw.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/xaJEgfr/jw_library_apk_2020_download.pdfIn PDF document text
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/168872c45c9188.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/xoxaneral/the_magicians_land_ending.pdfIn PDF document text
    • http://bamemuwibe.epizy.com/geometry_textbook_answers_chapter_12.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_off0000c4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C0 5752 bytes
SHA-256: 5172d57cc81a9c626504f6e395a639f99b70b12d7cde4ba8e3b4a2a2c8bef299
font_01_sfnt_off0000d849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD849 10424 bytes
SHA-256: 6c21b3e98baec07666e68456be775a9c52d444a3c130109324fa32a603e9e1fc