Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c53fbf2148ad73c…

MALICIOUS

PDF

76.1 KB Created: 2021-04-28 21:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a55228786eb8bfb16ba44d4f23381e3b SHA-1: ca4cf70eacb6578922a1e6ee47b216fc50cb640a SHA-256: 6c53fbf2148ad73cad7707077b5664807796ae2aa19da6ff46e4ba51b5ccc2b4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/strik?utm_term=evenflo+advanced+chase+lx+harness+booster+car+seat+manual PDF link annotation
    • http://pakawuwujawo.getenjoyment.net/line_drawing_book.pdfIn PDF document text
    • http://sikagez.22web.org/pukas.pdfIn PDF document text
    • http://zajapokel.22web.org/agribusiness_risk_management.pdfIn PDF document text
    • http://wigoruvijesix.iblogger.org/the_lorax_and_sustainable_development_worksheet_answers.pdfIn PDF document text
    • http://lifesodupix.22web.org/setina_pb400_installation_instructions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_5fd2a2eeda110.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/xixuzudegalovanegome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409621/normal_606cb7d0e16b9.pdfIn PDF document text
    • http://fulifubajamo.mywebcommunity.org/27437950945.pdfIn PDF document text
    • http://tizakeguwowil.22web.org/philips_norelco_1150x_razor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461202/normal_603af0a016ea2.pdfIn PDF document text
    • http://zivetizigomiki.iblogger.org/3131702616.pdfIn PDF document text
    • http://wuledorifik.22web.org/65008116461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495843/normal_6043600c8f85e.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/silixugaxel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sipikoz.epizy.com/ejemplo_de_un_anteproyecto_de_investigacion.pdfIn PDF document text
    • http://zazupixuwup.rf.gd/xitixadekitibixosarivi.pdfIn PDF document text
    • http://gewuruso.epizy.com/brotherhood_of_man_sheet_music.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/liwusegonofavuxojurofu.pdfIn PDF document text
    • http://resogugibu.rf.gd/violin_f_hole_template.pdfIn PDF document text
    • http://davamedanaxosen.rf.gd/65176629486.pdfIn PDF document text
    • http://bobitemobo.epizy.com/injustice_god_among_us_mod_apk_andropalace.pdfIn PDF document text
    • http://sosukaf.epizy.com/pidolumiguvazegaxan.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_off0000ea69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA69 5488 bytes
SHA-256: 1ce7dd0c0ff6fcc0e2d81d910734ea3abb2e7e135e817972d00d8f7526802096
font_01_sfnt_off0000fcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF9 10964 bytes
SHA-256: f0c6088327a0783e06c741991d4ed8069a0aa444b52409fe176455a30e62c5e4

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