Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e45438e61d04457…

MALICIOUS

PDF

73.5 KB Created: 2021-02-16 17:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b985ae5c6b95affd9c092e0d3a62d1f7 SHA-1: 4ced098020a49c1b31127804f7dba1b511d6b51d SHA-256: 2e45438e61d0445705b15a349a3e9a3dee6ee2384f02ea913d9786c582f0de91
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious nature of the document. The ML classifier and ClamAV detection strongly support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=how+many+chapters+are+in+the+tattooist+of+auschwitz In PDF document text
    • https://static.s123-cdn-static.com/uploads/4389370/normal_5ffa246c66351.pdfIn PDF document text
    • http://trokot-shtorki.online/lutozix5pv9y.pdfIn PDF document text
    • https://damemebu.weebly.com/uploads/1/3/5/3/135316778/tinojuf.pdfIn PDF document text
    • http://ita-bio.fun/what_is_the_exact_meaning_of_verbal_communicationjj3rs.pdfIn PDF document text
    • http://nonretloli.site/80637914961rhf2b.pdfIn PDF document text
    • http://dkmz1.club/descargar_driver_behringer_xenyx_qx1202usbewpx5.pdfIn PDF document text
    • https://vasidigugadojo.weebly.com/uploads/1/3/0/9/130969577/6671847.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366395/normal_600383246acdd.pdfIn PDF document text
    • http://thesimplycompleteseries.com/beach_party_craft_summer_high_school_adventure7v466.pdfIn PDF document text
    • http://prizinsta365.site/godidevolojotuguzinp7.pdfIn PDF document text
    • http://neuroncraft.online/jidibor54jr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475577/normal_60090698c1563.pdfIn PDF document text
    • http://avit0.pro/impossible_quiz_answers_7231wyl.pdfIn PDF document text
    • http://dnepr24.info/medical_tourism_guideghexu.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/pewibim/15066450686.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/pan_application_form_online.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/jutitejifekozevotoletep.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/music_audio_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/job_alert_app_software.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_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 5428 bytes
SHA-256: d3eda8f46a74a927961afd593f049603fa61397685166c5a7b4db67ba1cf8877
font_01_sfnt_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 10584 bytes
SHA-256: 62bed50ee15f84554f86a78fd9abaeeddfd87f2bfcc6e455667650df92ade3e4

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