Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a4814bc30c9e38…

MALICIOUS

PDF

72.6 KB Created: 2021-02-21 00:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 08701c57131db5e3bc073bade3c0bb79 SHA-1: f09aad9682743d764677bb524400d659d617a5a2 SHA-256: e6a4814bc30c9e38ad3e6774892b4e40084259b490024ca542c4787d91c1732d
292 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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 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.
  • Fake encrypted/secure-document view lure high SE_ENCRYPTED_DOC_LURE
    Document claims to be an encrypted or protected file that must be opened through a 'secure view' link, and the action link uses deceptive infrastructure. This is the secure-document credential-phishing carrier: the page imitates a secure-mail / document-cloud gate while the link leads to a harvesting site. action link to abused redirector.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=aws+d1.1+2020+free+pdf+download In PDF document text
    • https://juxibawazorar.weebly.com/uploads/1/3/3/9/133997202/1212971.pdfIn PDF document text
    • http://lajenasuwo.iblogger.org/23173144873.pdfIn PDF document text
    • http://pijirikuzi.iblogger.org/34563973692.pdfIn PDF document text
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/muretudekin_gemomafojofewow_xuxazid.pdfIn PDF document text
    • https://mateboxabivof.weebly.com/uploads/1/3/4/7/134763458/lukuvos.pdfIn PDF document text
    • https://xinefozi.weebly.com/uploads/1/3/0/7/130775465/4105859.pdfIn PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/gifoka_gupemofiweratup_terapewo_biregirurakum.pdfIn PDF document text
    • http://nelitip.22web.org/bhutan_tour_guide.pdfIn PDF document text
    • http://jipuvojenibomig.22web.org/android_apps_making_software_free.pdfIn PDF document text
    • https://pebizenif.weebly.com/uploads/1/3/0/8/130874023/f9829b8e44.pdfIn PDF document text
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/waponab-fowerav-gopikafapa.pdfIn PDF document text
    • http://fujubipe.22web.org/22162671104.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiximevisek.epizy.com/nalula.pdfIn PDF document text
    • http://nufagogofuj.epizy.com/31147329458.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/xosutotezumum.pdfIn PDF document text
    • http://vazavaxajude.rf.gd/backtrack_4_linux.pdfIn PDF document text
    • http://safefimij.epizy.com/75864842705.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_off0000df9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9A 5476 bytes
SHA-256: 508bc8d4c070588c0c9d16f1191e1a0ebd9f46aa41d0bef4de016374a221f4fc
font_01_sfnt_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 10252 bytes
SHA-256: ccd005782c4c55fa7cbddefcff738e838006fbcbe19deeccc7550f86872c24d2