Malicious PDF — malware analysis report

Static analysis result for SHA-256 2725012e0cfff43c…

MALICIOUS

PDF

68.7 KB Created: 2021-02-18 18:51:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 964f9d9922032c4becdf35f275075482 SHA-1: e8b2a54d073fcb1d05f0574943851cc027546f6b SHA-256: 2725012e0cfff43c9de67dbdb153aae1ec5de1c2f04580477ee2d6528c84090d
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://crophysi.ru/wix?keyword=genital+warts+tea+tree+oil+forum In PDF document text
    • https://cdn.sqhk.co/vuzefegevo/d1ghbNt/pekir.pdfIn PDF document text
    • https://cdn.sqhk.co/wefegiwezon/iTgdigC/89267522180.pdfIn PDF document text
    • https://fusofajo.weebly.com/uploads/1/3/1/4/131438110/519dbbacd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459027/normal_5fc6da0d47ed9.pdfIn PDF document text
    • http://ionatr.space/munavujazowa5dbn1.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/ichiyrR/cheesecake_recipe_with_cream_cheese_and_condensed_milk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481423/normal_6024031308641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_6022aed662378.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/bgc1jjk/63505275333.pdfIn PDF document text
    • http://songkfrk.site/zejujofarufudzcqu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_602611658013f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392441/normal_60210dfc5e29a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499995/normal_5fc8347e181d0.pdfIn PDF document text
    • http://sluzhba1.net/free_printable_phonics_worksheets_digraphs55zfz.pdfIn PDF document text
    • https://gawozigojuvapa.weebly.com/uploads/1/3/4/8/134896601/3574104.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fifajepetu.rf.gd/48735926521.pdfIn PDF document text
    • http://nedajazamofo.epizy.com/ryzen_3600_overclocking_guide.pdfIn PDF document text
    • http://xixakoju.rf.gd/sifupolijuvemupidodov.pdfIn PDF document text
    • http://zukeligo.rf.gd/farm_risk_assessment_template_uk.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_off0000cff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF8 5036 bytes
SHA-256: 8ff049138d5a2dd393ad60ed9b6de32adecd02b282941bdcb0939542a0753782
font_01_sfnt_off0000e118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE118 10684 bytes
SHA-256: 179b1422dc7a5725f96e0ea8cabe7f1b539e196dd3aa3b9540a5f0fafbe1da72

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