Malicious PDF — malware analysis report

Static analysis result for SHA-256 12676997d98c2899…

MALICIOUS

PDF

65.8 KB Created: 2021-02-10 22:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: adf6910750a3297ceea157671debb9aa SHA-1: ae2646fa4c69ffc4557867f7b9ad5747b591d818 SHA-256: 12676997d98c2899c28b46c29d0acef76b4cd5bdf15e5eec7b2986436576a454
184 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
  • 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.
  • 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.
  • 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://yafferge.ru/aws?utm_term=french+verb+faire+worksheet In PDF document text
    • http://item-get.top/71099667171e02uu.pdfIn PDF document text
    • http://1xbet-football.fun/wiwujiwuzumqob1t.pdfIn PDF document text
    • http://instapresent.site/nemufovexuzewoccyef.pdfIn PDF document text
    • http://citimart.online/glencoe_health_chapter_23_lesson_1_answers238ry.pdfIn PDF document text
    • http://bred-enligne.com/inflectional_affixeseqs70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375531/normal_6004b5b5443a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5fe252e009ba7.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/igUjbso/stickman_legends_shadow_wars_apk_obb.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebevon/chhgcTr/nubuvizuv.pdfIn PDF document text
    • http://datinge.site/monster_legends_breeding_guide_chartdcotw.pdfIn PDF document text
    • http://bogavevi.22web.org/global_tech_simulation_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410027/normal_601de6e86b873.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pegewolonu.rf.gd/46553146971.pdfIn PDF document text
    • http://fanirivi.rf.gd/sadefavezi.pdfIn PDF document text
    • http://budezeja.rf.gd/27190754274.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_off0000c112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC112 5248 bytes
SHA-256: 8497f3e10584fb67924d642f066bc143e8cdcfb4cb7ce8b86c691de05475c5da
font_01_sfnt_off0000d305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD305 11716 bytes
SHA-256: 128069f732cc699c5bb0986bafad6cf1318929073ba184e7207088a374c4d1ab