Malicious PDF — malware analysis report

Static analysis result for SHA-256 752425c0ae6bcd8e…

MALICIOUS

PDF

69.5 KB Created: 2021-02-09 20:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a7bafd93bfafff623230a6c86685e0be SHA-1: 1e3a87b771f964e5765342687aef752b414fac57 SHA-256: 752425c0ae6bcd8eff50694de624a7d728ae95246d150a8467cb02db80167d30
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier and ClamAV also identified it as malicious. The embedded URL points to a phishing site, indicating the likely intent is to lure users into a phishing scam. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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/wb?keyword=linear%20air%20track%20lab%20report%20answers In PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/2322458.pdfIn PDF document text
    • https://mebijanuwirat.weebly.com/uploads/1/3/4/0/134042853/6808362.pdfIn PDF document text
    • https://gomimujexewawid.weebly.com/uploads/1/3/1/0/131070583/mefafa_zifadixutem_fiwuwawasavo.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/xozevo-bigipotutoke-xufuvo.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/sudorogunumamo.pdfIn PDF document text
    • http://pepipejevu.iblogger.org/vizero.pdfIn PDF document text
    • https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/donisadutimex.pdfIn PDF document text
    • https://zapizurur.weebly.com/uploads/1/3/4/9/134900478/manuvunojoweta.pdfIn PDF document text
    • https://bufetokarad.weebly.com/uploads/1/3/4/0/134096279/4f1eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/phonics_word_search_worksheets.pdfIn PDF document text
    • http://xumugipetoje.epizy.com/google_sheet_online.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/rukekemusen.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/zipebonazoxulis.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/mental_illness_relapse_prevention_plan_worksheet.pdfIn PDF document text
    • http://xajejewaf.rf.gd/punof.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/mevuwojod.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/carcinomatose_peritoneal.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/template_cv_in_word.pdfIn PDF document text
    • http://jalozuxir.rf.gd/football_manager_2019_in_game_editor_guide.pdfIn PDF document text
    • http://fububosuvakosal.epizy.com/zigififaxop.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_off0000ca7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7F 5164 bytes
SHA-256: 4dc74cd97b43e74ceb953bde20b28ed7a7c8afda9322a2be3e6eac0784ad96f1
font_01_sfnt_off0000dc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC32 14352 bytes
SHA-256: 7a9f945df7fca079f0dcfba3b1aec82ce67cfc960b8422b26225002b6e2795a7

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