Malicious PDF — malware analysis report

Static analysis result for SHA-256 6313b4fbeb4626c2…

MALICIOUS

PDF

75.2 KB Created: 2021-03-27 10:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 500ec10520a6251e49bdc5bc69c55793 SHA-1: 406c67c94776f2f6eef55ceed67ea724b6c6b00e SHA-256: 6313b4fbeb4626c274a5650ec6d021abc61b32b746b33448ea2297d63503afae
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links to known malicious redirector infrastructure, specifically `https://crophysi.ru/wix?keyword=oracion+por+la+sangre+de+cristo+para+casos+dificiles`. Additionally, the document is identified as a link farm on disposable hosting, indicating a pattern of distributing malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

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=oracion+por+la+sangre+de+cristo+para+casos+dificiles In PDF document text
    • https://cdn.sqhk.co/guludagew/hvSicgi/tech_news_today_usa.pdfIn PDF document text
    • http://zajevafegex.iblogger.org/lightroom_preset_pack_android.pdfIn PDF document text
    • http://fivogudog.iblogger.org/secret_agent_training_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_6028b85e5370a.pdfIn PDF document text
    • http://pakamid.22web.org/la_girl_pro_concealer_shade_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382782/normal_5fdd823d12f15.pdfIn PDF document text
    • https://cdn.sqhk.co/tunixomaj/3iciigY/8264576395.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/y9tibIS/scary_teacher_3d_mod_apk_unlock_all_chapter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458634/normal_601d002ad4c01.pdfIn PDF document text
    • http://turekawetareju.iblogger.org/grounding_for_the_metaphysics_of_morals_chapter_1_summary.pdfIn PDF document text
    • http://retenenu.iblogger.org/certificate_creation_software_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://miseparasunafit.rf.gd/14995315804.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/82274605959.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/breaded_chicken_tenders_george_foreman_grill.pdfIn PDF document text
    • http://xavisijividefo.epizy.com/wopinaloxebewofil.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/xisusepudifexenidikita.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/tiberutelefotefavite.pdfIn PDF document text
    • http://semabuxof.rf.gd/peter_pan_original_story.pdfIn PDF document text
    • http://zakivijojinikij.epizy.com/98793915663.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_off0000e49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49C 5348 bytes
SHA-256: 15b9c7ab047197fae9fd617d7f4aaaa17ed854b7af3eec7e1c2b82229624dd1f
font_01_sfnt_off0000f6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D2 11796 bytes
SHA-256: 1a82dc50078e16472e5b6b6a2db6c265aeb0bc343ab1396b933615695f464f59

Open this report in the interactive analyzer, or submit your own file for analysis.